View source for Internal Revenue Service

{{Short description|Revenue service of the US federal government}}
{{Redirect|IRS}}
{{Use mdy dates|date=April 2016}}
{{Lead extra info|date=March 2025}}
{{Infobox government agency
| agency_name     = Internal Revenue Service
| nativename      = 
| logo            = Internal Revenue Service logo.svg{{!}}class=skin-invert
| logo_width      = 160px
| image           = The Internal Revenue Service Building, located in the center of the Federal Triangle complex in Washington, D.C LCCN2013634106.jpg
| image_caption   = The Internal Revenue Service Building in 2012
| image_size      = 225px
| seal            = 
| seal_width      = 140px
| seal_caption    = 
| agency_type     = [[Revenue service]]
| formed          = {{start date and age|1862|7|1}}<ref>{{cite web|title=Office of Commissioner of Internal Revenue (Created by an act of Congress, July 1, 1862) |url=https://www.irs.gov/newsroom/previous-irs-commissioners |website=irs.gov |access-date=October 21, 2018}}</ref> ''(as Office of Commissioner of Internal Revenue)''
| jurisdiction    = [[Federal government of the United States]]
| headquarters    = [[Internal Revenue Service Building]]<br />1111 [[Constitution Avenue|Constitution Ave., NW]]<br />[[Washington, D.C.]] 20224<br />United States<ref>{{cite web|author=Internal Revenue Service|title=The Agency, its Mission and Statutory Authority|url=https://www.irs.gov/about-irs/the-agency-its-mission-and-statutory-authority |website=irs.gov |access-date=October 21, 2018}}</ref>
| employees       = 89,767 (2023),<ref>{{cite web |url=https://www.irs.gov/statistics/irs-budget-and-workforce |title=IRS Budget and Workforce |publisher=Inland Revenue Service |access-date=January 18, 2025}}</ref> 93,654 (2022)<ref>{{cite web |url=https://www.opm.gov/about-us/open-government/Data/Apps/Agencies/index.aspx |title=Open Government Data |publisher=Office of Personnel Management |access-date=December 7, 2022}}</ref> (79,070 [[Full-time equivalent|FTE]]) (2022)<ref name=IRSbudget>{{cite web |url=https://www.irs.gov/statistics/irs-budget-and-workforce |title=IRS Budget & Workforce |publisher=Department of Treasury Internal Revenue Service |access-date=May 29, 2023}}</ref>
| budget          = $14.3 billion (2022)<ref name=IRSbudget />
| chief1_name     = [[Michael Faulkender]]
| chief1_position = [[Commissioner of Internal Revenue|Acting Commissioner]]
| parent_agency   = [[United States Department of the Treasury|Department of the Treasury]]
| website         = {{URL|https://www.irs.gov/|irs.gov}}
| footnotes       = 
}}
{{UStaxation}}
The '''Internal Revenue Service''' ('''IRS''') is the [[revenue service]] for the [[Federal government of the United States|United States federal government]], which is responsible for collecting [[Taxation in the United States|U.S. federal taxes]] and administering the [[Internal Revenue Code]], the main body of the federal statutory tax law. It is an agency of the [[United States Department of the Treasury|Department of the Treasury]] and led by the [[Commissioner of Internal Revenue]], who is appointed to a five-year term by the President of the United States. The duties of the IRS include providing tax assistance to taxpayers; pursuing and resolving instances of erroneous or fraudulent tax filings; and overseeing various benefits programs, including the [[Affordable Care Act]].<ref>{{cite web|url=https://www.irs.gov/Affordable-Care-Act/Affordable-Care-Act-Tax-Provisions|title=Affordable Care Act Tax Provisions |website=Internal Revenue Service}}</ref>

[[File:IRS Sign.JPG|thumb|IRS location sign at Constitution Avenue, Washington, D.C.]]

The IRS originates from the '''[[Commissioner of Internal Revenue]]''', a federal office created in 1862 to assess the nation's first [[income tax]] to fund the [[American Civil War]]. The temporary measure funded over a fifth of the Union's war expenses before being allowed to expire a decade later. In 1913, the [[Sixteenth Amendment to the United States Constitution|Sixteenth Amendment to the U.S. Constitution]] was ratified, authorizing Congress to impose a tax on income and leading to the creation of the '''Bureau of Internal Revenue'''. In 1953, the agency was renamed the Internal Revenue Service, and in subsequent decades underwent numerous reforms and reorganizations, most significantly in the 1990s.

Since its establishment, the IRS has been largely responsible for collecting the revenue needed to fund the United States federal government, with the rest being funded either through the [[U.S. Customs and Border Protection]] (collecting [[Duty (tax)|duties]] and [[tariff]]s) or the [[Federal Reserve]] (purchasing [[United States Treasury security|U.S. treasuries]]).<ref>{{Cite web |last1=Faria e Castro |first1=Miguel |last2=Jordan-Wood |first2=Samuel |date=November 21, 2023 |title=The Fed's Remittances to the Treasury: Explaining the 'Deferred Asset' |url=https://www.stlouisfed.org/on-the-economy/2023/nov/fed-remittances-treasury-explaining-deferred-asset |archive-url=https://web.archive.org/web/20240327151852/https://www.stlouisfed.org/on-the-economy/2023/nov/fed-remittances-treasury-explaining-deferred-asset |archive-date=March 27, 2024 |access-date=2024-05-01 |website=www.stlouisfed.org |language=en}}</ref> The IRS faces periodic [[IRS targeting controversy|controversy]] and opposition over its methods, constitutionality, and the [[Taxation as theft|principle of taxation]] generally. In recent years, the agency has struggled with budget cuts, under-staffed workforce, outdated technology and reduced morale, all of which collectively result in the inappropriate enforcement of tax laws against [[Wealth inequality in the United States|high earners]] and large [[corporation]]s, reduced tax collection, rising [[Government budget balance|deficits]], lower [[Government spending|spending]] on important priorities, or further tax increases on compliant [[tax]]payers to compensate for lost [[revenue]].<ref>{{cite web|title=ACTC letter to Congressional-Leadership|url=https://www.actconline.org/wp-content/uploads/2014/05/ACTC-letter-to-Congressional-Leadership.pdf|website=American College Of Tax Counsel |date=July 13, 2016}}</ref><ref>{{Cite web |date=2024-06-24 |title=The Case for a Robust Attack on the Tax Gap |url=https://home.treasury.gov/news/featured-stories/the-case-for-a-robust-attack-on-the-tax-gap |access-date=2024-07-11 |website=U.S. Department of the Treasury |language=en}}</ref> Research shows that IRS audits raise revenue, both through the initial audit and indirectly by deterring future tax cheating.<ref name=":02">{{Cite report |url=http://dx.doi.org/10.3386/w31376 |title=A Welfare Analysis of Tax Audits Across the Income Distribution |last1=Boning |first1=William |last2=Hendren |first2=Nathaniel |date=2024 |publisher=The Quarterly Journal of Economics |last3=Sprung-Keyser |first3=Ben |last4=Stuart |first4=Ellen|doi=10.3386/w31376 }}</ref> According to a 2024 study, "an additional $1 spent auditing taxpayers above the 90th income percentile yields more than $12 in revenue, while audits of below-median income taxpayers yield $5."<ref name=":02" />

{{as of|2018|post=,}} it saw a 15 percent reduction in its [[workforce]], including a decline of more than 25 percent of its [[enforcement]] staff.<ref>{{cite news|date=2018-06-28|title=IRS Nominee Says He's Never Had a Client Under Audit for a Decade|url=https://www.bloomberg.com/news/articles/2018-06-28/irs-nominee-rettig-sees-duration-of-trump-tax-audit-as-unusual|access-date=2020-09-19|website=Bloomberg |last1=Davison |first1=Laura |last2=Browning |first2=Lynnley}}</ref> During the 2023 fiscal year, the agency processed more than 271.4 million [[tax return]]s including more than 163.1 million individual income tax returns.<ref name=":0">{{Cite web |title=IRS releases 2023 Data Book describing agency's transformation through statistics {{!}} Internal Revenue Service |url=https://www.irs.gov/newsroom/irs-releases-2023-data-book-describing-agencys-transformation-through-statistics |access-date=2024-07-11 |website=www.irs.gov |language=en}}</ref> For FY 2023, the IRS collected approximately $4.7 trillion, which is approximately 96 percent of the operational funding for the federal government; funding widely throughout to different aspects of [[Society of the United States|American society]], from education and healthcare to national defense and infrastructure.<ref name=":0" />

On December 4, 2024, President-elect [[Donald Trump]] announced his intention to nominate [[Billy Long]] to serve as [[Commissioner of Internal Revenue|Commissioner]] of the Internal Revenue Service.<ref>{{Cite web |last=Fields |first=Ashleigh |date=2024-12-04 |title=Donald Trump names Billy Long as IRS head |url=https://thehill.com/homenews/administration/5023124-trump-names-billy-long-as-irs-head/ |access-date=2024-12-08 |website=The Hill |language=en-US}}</ref><ref>{{Cite web |last=Erb |first=Kelly Phillips |title=Trump Picks Former Representative Billy Long As Next IRS Commissioner |url=https://www.forbes.com/sites/kellyphillipserb/2024/12/04/trump-picks-former-representative-billy-long-as-next-irs-commissioner/ |access-date=2024-12-08 |website=Forbes |language=en}}</ref> As of April 18, 2025, five officials have served as acting commissioner since the beginning of the [[second presidency of Donald Trump]].<ref>{{cite news |last1=Rubin |first1=Richard |last2=Schwartz |first2=Brian |last3=Parti |first3=Tarini |title=Trump to Replace Acting IRS Commissioner |url=https://www.wsj.com/politics/policy/trump-to-replace-acting-irs-commissioner-f5494a97 |access-date=18 April 2025 |work=The Wall Street Journal |date=18 April 2025}}</ref>

==History==
{{see also|Taxation history of the United States}}

===American Civil War (1861–1865)===
[[File:George S. Boutwell, the first Commissioner of Internal Revenue Service.jpg|thumb|[[George S. Boutwell]] was the first [[Commissioner of Internal Revenue]] under President [[Abraham Lincoln]].]]
In July 1862, during the [[American Civil War]], [[President of the United States|President]] [[Abraham Lincoln]] and [[United States Congress|Congress]] passed the [[Revenue Act of 1862]], creating the office of commissioner of internal revenue and enacting a temporary [[income tax]] to pay war expenses.

The Revenue Act of 1862 was passed as an emergency and temporary war-time tax. It copied a relatively new British system of income taxation, instead of trade and property taxation. The first income tax was passed in 1862:
*The initial rate was 3% on income over $800, which exempted most wage-earners.
*In 1862 the rate was 3% on income between $600 and $10,000, and 5% on income over $10,000.
By the end of the war, 10% of [[Union (American Civil War)|Union]] households had paid some form of income tax, and the Union raised 21% of its war revenue through income taxes.<ref>{{cite web |url=http://www.tax.org/Museum/1861-1865.htm |title=1861–1865: The Civil War |publisher=Tax.org |access-date=August 9, 2010 |archive-date=February 16, 2011 |archive-url=https://web.archive.org/web/20110216062329/http://www.tax.org/Museum/1861-1865.htm  }}</ref>

===Post Civil War, Reconstruction, and popular tax reform (1866–1913)===
After the Civil War, [[Reconstruction era|Reconstruction]], railroads, and transforming the North and South war machines towards peacetime required public funding. However, in 1872, seven years after the war, lawmakers allowed the temporary Civil War income tax to expire.

Income taxes evolved, but in 1894 the [[Supreme Court of the United States|Supreme Court]] declared the Income Tax of 1894 unconstitutional in ''[[Pollock v. Farmers' Loan & Trust Co.]]'', a decision that contradicted ''[[Hylton v. United States]]''.<ref>3 U.S. 171 (1796).</ref> The federal government scrambled to raise money.<ref>{{cite web |url=http://www.tax.org/Museum/1866-1900.htm |title=1866–1900: Reconstruction to the Spanish–American War |publisher=Tax.org |access-date=August 9, 2010  |archive-url=https://web.archive.org/web/20100814151715/http://www.tax.org/museum/1866-1900.htm |archive-date=August 14, 2010 }}</ref>

In 1906, with the election of President [[Theodore Roosevelt]], and later his successor [[William Howard Taft]], the United States saw a [[Populism|populist]] movement for tax reform. This movement culminated during then-candidate [[Woodrow Wilson]]'s election of 1912 and in February 1913, the ratification of the [[Sixteenth Amendment to the United States Constitution]]:

{{blockquote|The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration.}}

This granted Congress the specific power to impose an income tax without regard to apportionment among the states by population. By February 1913, 36 states had ratified the change to the Constitution. It was further ratified by six more states by March. Of the 48 states at the time, 42 ratified it. Connecticut, Rhode Island, and Utah rejected the amendment; Pennsylvania, Virginia, and Florida did not take up the issue.<ref>{{cite web|url=http://www.usconstitution.net/constamnotes.html |title=Notes on the Amendments – The U.S. Constitution Online |publisher=USConstitution.net |access-date=August 9, 2010}}</ref>

===Post 16th Amendment (1913–present)===
Though the constitutional amendment to allow the federal government to collect income taxes was proposed by [[William Howard Taft|President Taft]] in 1909, the [[Sixteenth Amendment to the United States Constitution|16th Amendment]] was not ratified until 1913, just before the start of the [[World War I|First World War]]. That same year, the first edition of the 1040 form was introduced. A copy of the 1913 form can be viewed online<ref>{{cite web|url=https://www.irs.gov/pub/irs-utl/1913.pdf |title=The first 1040 with instructions |access-date=November 8, 2011|archive-url=https://web.archive.org/web/20230523143545/https://www.irs.gov/pub/irs-utl/1913.pdf | archive-date=May 23, 2023}}</ref><ref>{{cite web |title=A scanned copy of the first 1040 form, from the US Library of Congress Blogs |url=https://blogs.loc.gov/law/files/2017/04/Historic-Form-1040-pg1-2.jpg |url-status=live |archive-url=https://web.archive.org/web/20230518090918/https://blogs.loc.gov/law/2017/04/the-first-form-1040/ |archive-date=May 18, 2023 |website=Library Of Congress}}</ref> and shows that only those with annual incomes of at least $3,000 ({{inflation|USD|3000|1913|fmt=eq|r=-2}}) were instructed to file an income tax return.

In the first year after the ratification of the 16th Amendment, no taxes were collected. Instead, taxpayers simply completed the form and the IRS checked the form for accuracy. The IRS's workload jumped by ten-fold, triggering a massive restructuring. Professional tax collectors began to replace a system of "patronage" appointments. The IRS doubled its staff but was still processing 1917 returns in 1919.<ref>{{cite web |url=http://www.tax.org/Museum/1901-1932.htm |title=1901–1932: The Income Tax Arrives |publisher=Tax.org |date=April 14, 1906 |access-date=August 9, 2010  |archive-url=https://web.archive.org/web/20100814150842/http://www.tax.org/museum/1901-1932.htm |archive-date=August 14, 2010 }}</ref>

Income tax raised much of the money required to finance the war effort; in 1918 a new Revenue Act established a top tax rate of 77%.

[[File:1920 tax forms IRS.jpg|thumb|left|People filing tax forms in 1920]]

In 1919 the IRS was tasked with enforcement of laws relating to [[Prohibition in the United States|prohibition of alcohol sales and manufacture]]; this was transferred to the jurisdiction of the Department of Justice in 1930. After repeal in 1933, the IRS resumed collection of taxes on beverage alcohol.<ref name=IRSHL>{{cite web|url=https://www.irs.gov/newsroom/historical-highlights-of-the-irs |title=Historical highlights of the IRS|access-date=October 6, 2017}}</ref> The alcohol, tobacco and firearms activities of the bureau were segregated into the [[Bureau of Alcohol, Tobacco, Firearms and Explosives]] in 1972.

A [[Revenue Act of 1942|new tax act was passed in 1942]] as the United States entered the [[World War II|Second World War]]. This act included a special wartime surcharge. The number of American citizens who paid income tax increased from about four million in 1939 to more than forty-two million by 1945.<ref>{{cite book |first=JoAnn A. |last=Grote |title=The Internal Revenue Service |publisher=Infobase Publishing |date=2001 |isbn=0-7910-5989-8 |page=43}}</ref>

In 1952, after a series of politically damaging incidents of [[tax evasion]] and bribery among its own employees, the Bureau of Internal Revenue was reorganized under a plan put forward by [[Harry S. Truman|President Truman]], with the approval of Congress. The reorganization decentralized many functions to new district offices which replaced the collector's offices. Civil service directors were appointed to replace the politically appointed collectors of the Bureau of Internal Revenue. Not long after, the bureau was renamed the Internal Revenue Service.<ref>{{citation-attribution|1={{cite web|url= https://www.governmentattic.org/5docs/IRS-HistoricalFactBook_1992.pdf |title=IRS Historical Fact Book: A Chronology. 1646–1992. Department of the Treasury, Internal Revenue Service |website=governmentattic.org}} }}</ref>

In 1954 the filing deadline was moved from March 15 to April 15.

The [[Tax Reform Act of 1969]] created the [[Alternative minimum tax|Alternative Minimum Tax]].

In 1969, [[Richard Nixon]] directed the IRS to audit [[Nixon's Enemies List|his political opponents]], as well as [[Opposition to United States involvement in the Vietnam War|opponents of US involvement in the Vietnam War]]. The IRS's Activist Organizations Committee, later renamed the Special Services Staff, created a target list of more than 1,000 organizations and 4,000 individuals. A White House memo said that "What we cannot do in a courtroom via criminal prosecutions to curtail the activities of some of these groups, IRS can do by administrative action."<ref>{{Cite book |last=Perlstein |first=Rick |url=https://archive.org/details/nixonlandriseofp0000perl |title=Nixonland : the rise of a president and the fracturing of America |date=2008 |publisher=New York : Scribner |others=Internet Archive |isbn=978-0-7432-4302-5 |pages=413}}</ref> The then commissioner [[Randolph W. Thrower]] resisted Nixon's request to audit his political enemies and was later fired. Thrower's successor, [[Johnnie Mac Walters]] chose to lock the list in his safe and deliver it to the Congress after the [[Watergate Scandal]] broke out.

By 1986, limited electronic filing of tax returns was possible.

The [[Internal Revenue Service Restructuring and Reform Act of 1998]] ("RRA 98") changed the organization from geographically oriented to an organization based on four operating divisions.<ref>{{cite web|url=https://www.treasury.gov/tigta/iereports/2010reports/2010IER002fr.html|title=Treasury Reports|website=www.treasury.gov}}</ref> It added "10 deadly sins" that require immediate termination of IRS employees found to have committed certain misconduct.<ref>{{cite web|url=https://www.govexec.com/federal-news/2002/04/irs-10-deadly-sins-to-remain-deadly/11424/|title=IRS' 10 deadly sins to remain deadly|website=Government Executive|date=April 11, 2002 }}</ref>

Enforcement activities declined. The [[IRS Oversight Board]] noted that the decline in enforcement activities has "rais[ed] questions about tax compliance and fairness to the vast majority of citizens who pay all their taxes".<ref>{{cite web |url=http://www.jct.gov/x-33-01.pdf |title=Report of the Joint Committee on Taxation Relating to the Internal Revenue Service as Required by the IRS Reform and Restructuring Act of 1998 (JCX-33-01) |publisher=Joint Committee on Taxation |date=May 4, 2001 |access-date=October 20, 2018 |archive-date=November 13, 2018 |archive-url=https://web.archive.org/web/20181113041739/http://www.jct.gov/x-33-01.pdf  }}</ref> In June 2012, the IRS Oversight Board recommended to Treasury a fiscal year 2014 budget of $13.074{{spaces}}billion for the Internal Revenue Service.<ref>{{cite web |url=https://www.treasury.gov/IRSOB/reports/Documents/IRSOB_FY14%20IRS%20Budget_Web061413.pdf |title=FY2014 IRS Budget Recommendation Special Report |publisher=IRS Oversight Board |date=May 2013 |access-date=March 3, 2022}}</ref>

On December 20, 2017, Congress passed the [[Tax Cuts and Jobs Act of 2017]]. It was signed into law by President Trump on December 22, 2017.

In the three decades since 1991, the IRS had a substantial decrease in the number of employees per million residents, decreasing from 451 (in 1991) to 237 (in 2021).<ref>{{cite web |title=IRS workforce over time |url=https://www.taxpolicycenter.org/fiscal-fact/irs-workforce-over-time |date=July 4, 2022 |website=[[Tax Policy Center]] |access-date=May 29, 2023 |language=en }}</ref>  A decrease of {{Percentage | (451-237) | 451 | 1 | % = &nbsp;percent }}.

===Presidential tax returns (1973)===
From the 1950s through the 1970s, the IRS began using technology such as microfilm to keep and organize records. Access to this information proved controversial, when President Richard Nixon's tax returns were leaked to the public. His tax advisor, Edward L. Morgan, became the fourth law-enforcement official to be charged with a crime during [[Watergate scandal|Watergate]].<ref>{{cite news|url=http://www.time.com/time/magazine/article/0,9171,945108,00.html |archive-url=https://web.archive.org/web/20081222061726/http://www.time.com/time/magazine/article/0,9171,945108,00.html  |archive-date=December 22, 2008 |magazine=Time |title=Investigations: Fraud in Nixon's Taxes |date=November 18, 1974 |access-date=May 5, 2010}}</ref>

John Requard Jr., accused of leaking the Nixon tax returns, collected delinquent taxes in the slums of Washington. In his words: "We went after people for nickels and dimes, many of them poor and in many cases illiterate people who didn't know how to deal with a government agency." Requard admitted that he saw the returns but denied that he leaked them.<ref>{{cite web |url=http://articles.baltimoresun.com/2003-12-21/business/0312210282_1_nixon-requard-tax-liability/3 |title=How an IRS leak changed history altered history |work=Baltimore Sun |date=December 21, 2003 |access-date=August 9, 2010 |archive-date=July 11, 2012 |archive-url=https://archive.today/20120711214823/http://articles.baltimoresun.com/2003-12-21/business/0312210282_1_nixon-requard-tax-liability/3  }}</ref>

Reporter [[Jack White (reporter)|Jack White]] of ''[[The Providence Journal]]'' won the [[Pulitzer Prize]] for reporting about Nixon's tax returns. Nixon, with a salary of $200,000, paid $792.81 in federal income tax in 1970 and $878.03 in 1971, with deductions of $571,000 for donating "vice-presidential papers".<ref>{{cite web |url=https://www.baltimoresun.com/2003/12/21/how-an-irs-leak-changed-historyaltered-history/ |title=How an IRS leak changed historyaltered history |work=[[The Baltimore Sun]] |date=December 21, 2003 |access-date=August 9, 2010 |archive-date=January 11, 2012 |url-status=live |archive-url=https://web.archive.org/web/20120111131640/http://articles.baltimoresun.com/2003-12-21/business/0312210282_1_nixon-requard-tax-liability  }}</ref> This was one of the reasons for his famous statement: "Well, I'm not a crook. I've earned everything I've got."

So controversial was this leak, that most later US presidents released their tax returns (though sometimes only partially). These returns can be found online at the Tax History Project.<ref>[http://www.taxhistory.org/www/website.nsf/Web/PresidentialTaxReturns/ Tax History Project{{snd}}Presidential Tax Returns]. Taxhistory.org. Retrieved on August 10, 2013.</ref>

===Computerization (1959–present)===
By the end of the Second World War, the IRS was handling sixty million tax returns each year, using a combination of mechanical desk calculators, [[accounting machine]]s, and pencil and paper forms. In 1948 [[Punched card|punch card]] equipment was used. The first trial of a computer system for income tax processing was in 1955, when an [[IBM 650]] installed at [[Kansas City metropolitan area|Kansas City]] processed 1.1 million returns. The IRS was authorized to proceed with computerization in 1959 and purchased [[IBM 1401]] and [[IBM 7070]] systems for local and regional data processing centers. The [[Social Security number]] was used for taxpayer identification starting in 1965. By 1967, all returns were processed by computer and punched card data entry was phased out.<ref name=PC03>Paul Cenuzi, ''A History of Modern Computing'', MIT Press, 2003. {{ISBN|0-262-53203-4}}. pp. 119–122.</ref>

Information processing in the IRS systems of the late 1960s was in batch mode; microfilm records were updated weekly and distributed to regional centers for handling tax inquiries. A project to implement an interactive, realtime system, the "Tax Administration System", was launched, that would provide thousands of local interactive terminals at IRS offices. However, the [[Government Accountability Office|General Accounting Office]] prepared a report critical of the lack of protection of privacy in TAS, and the project was abandoned in 1978.<ref name=PC03 />

In 1995, the IRS began to use the public Internet for electronic filing. Since the introduction of [[IRS e-file|e-filing]], self-paced online tax services have flourished, augmenting the work of tax accountants, who were sometimes replaced.

By 2002, more than a third of all tax returns were filed electronically. This led to a decline in the number of paper returns being processed each year.<ref>{{cite web |title=Another Record-Breaking Number of Taxpayers Choose to Electronically File |url=https://www.irs.gov/pub/irs-news/ir-07-185.pdf |publisher=United States Internal Revenue Service |access-date=15 October 2022 |date=Nov 7, 2007}}</ref> As a result, the IRS implemented a consolidation plan for its paper tax return processing centers, closing five of its ten processing centers between 2003 and 2011.<ref>{{cite web |title=Further Consolidation of Processing Centers Is Underway in Response to Continued Increases in Electronic Filing |url=https://www.treasury.gov/tigta/auditreports/2018reports/201840038fr.pdf |publisher=United States Internal Revenue Service |access-date=15 October 2022 |date=31 May 2018  |archive-date=15 October 2022 |archive-url=https://web.archive.org/web/20221015032238/https://www.treasury.gov/tigta/auditreports/2018reports/201840038fr.pdf |website=Department of the Treasury }}</ref> The agency closed two more centers - one in 2019 and another in 2021 - as e-file use continued to expand.<ref>{{cite web |title=A Strategy Is Needed to Address Hiring Shortages As Efforts Continue to Close Tax Processing Centers |url=https://www.treasury.gov/tigta/auditreports/2020reports/202040019fr.pdf  |publisher=United States Treasury Inspector General for Tax Administration |access-date=15 October 2022 |date=11 March 2020 |archive-date=15 October 2022 |archive-url=https://web.archive.org/web/20221015032240/https://www.treasury.gov/tigta/auditreports/2020reports/202040019fr.pdf}}</ref><ref>{{cite web |title=Plans to Close the Austin Tax Processing Center Should Be Halted |url=https://www.treasury.gov/tigta/auditreports/2022reports/202240015fr.pdf  |publisher=United States Treasury Inspector General for Tax Administration |access-date=15 October 2022 |date=7 February 2022 |archive-url=https://web.archive.org/web/20221015032239/https://www.treasury.gov/tigta/auditreports/2022reports/202240015fr.pdf |archive-date=15 October 2022 }}</ref> E-filed tax returns accounted for 90% of all returns submitted during the 2021 filing season.<ref name="IRS 2021">{{cite web | title=Filing Season Statistics for Week Ending December 3, 2021 | website=Internal Revenue Service | date=2021-12-03 | url=https://www.irs.gov/newsroom/filing-season-statistics-for-week-ending-december-3-2021 | access-date=2022-10-15}}</ref>

In 2003, the IRS struck a deal with tax software vendors: The IRS would not develop online filing software and, in return, software vendors would provide free e-filing to most Americans.<ref>{{cite web|url=https://www.irs.gov/uac/Free-File:-Do-Your-Federal-Taxes-for-Free |title=Free File: Do Your Federal Taxes for Free |publisher=Irs.gov |date=January 29, 2013 |access-date=February 4, 2013}}</ref> In 2009, 70% of filers qualified for free electronic filing of federal returns.<ref>{{cite news |last=Murray Dixon |first=Teresa |date=February 21, 2010 |title=As e-filing turns 20, IRS trying to win over remaining third of taxpayers from paper returns |url=http://www.cleveland.com/business/index.ssf/2010/02/as_e-filing_turns_20_irs_tryin.html |work=[[The Plain Dealer]] |location=Cleveland |access-date=August 9, 2010}}</ref>

According to an inspector general's report, released in November 2013, identity theft in the United States is blamed for $4{{spaces}}billion worth of fraudulent 2012 tax refunds by the IRS. Fraudulent claims were made with the use of stolen taxpayer identification and Social Security numbers, with returns sent to addresses both in the US and internationally. Following the release of the findings, the IRS stated that it resolved most of the identity theft cases of 2013 within 120 days, while the average time to resolve cases from the 2011/2012 tax period was 312 days.<ref>{{cite news|title=IRS refunded $4 billion to identity thieves last year, inspector general's report says|url=https://www.cbsnews.com/news/irs-refunded-4-billion-to-identity-thieves-last-year-inspector-generals-report-says/|access-date=November 10, 2013|publisher=CBS News|date=November 7, 2013}}</ref><ref name="Fox News">{{cite web|url=https://www.foxnews.com/politics/irs-chief-warns-of-refund-delays-poor-customer-service-this-tax-year/|title=IRS chief warns of refund delays, poor customer service this tax year|publisher=Fox News|date=January 15, 2015}}</ref>

In September 2014, IRS commissioner [[John Koskinen]] expressed concern over the organization's ability to handle [[Patient Protection and Affordable Care Act|Obamacare]] and administer [[premium tax credit]]s that help people pay for health plans from the health law's insurance exchanges. It will also enforce the law's [[Individual shared responsibility provision|individual mandate]], which requires most Americans to hold health insurance.<ref>{{cite web|last1=Howell|first1=Tom|title=Bipartisan doubts emerge on IRS ability to handle Obamacare |website=[[The Washington Times]]|url=http://www.washingtontimes.com/news/2014/sep/10/irs-cant-escape-lerner-scandals-obamacare-hearing/|access-date=September 11, 2014}}</ref> In January 2015, [[Fox News]] obtained an email which predicted a messy tax season on several fronts. The email was sent by IRS Commissioner Koskinen to workers. Koskinen predicted the IRS would shut down operations for two days later that year which would result in unpaid [[furlough]]s for employees and [[Fan service|service cuts]] for [[taxpayer]]s. Koskinen also said delays to [[IT]] investments of more than $200{{spaces}}million may delay new taxpayer protections against [[Identity theft in the United States|identity theft]].<ref name="Fox News" /> Also in January 2015, the editorial board of ''[[The New York Times]]'' called the IRS budget cuts penny-wise-and-pound-foolish, where for every dollar of cuts in the budget, six were lost in tax revenue.<ref>{{cite news |url=https://www.nytimes.com/2015/01/18/opinion/sunday/irs-already-hobbled-likely-to-be-further-damaged.html |title=The Dangerous Erosion of Taxation |author=The Editorial Board |date=January 17, 2015 |work=[[The New York Times]] |access-date=March 6, 2017}}</ref>

A 2020 Treasury Department audit found the IRS had improved its [[Identity verification service|identity verification]] system offerings for taxpayers, but was still behind in fully meeting digital identity requirements.<ref name="Treasury-2022">{{cite web |title=While Progress Is Being Made on Digital Identity Requirements, Completion Dates to Achieve Compliance With Identity Proofing Standards Have Not Been Established |url=https://www.treasury.gov/tigta/auditreports/2020reports/202020012fr.pdf |website=www.treasury.gov |publisher=US Treasury Inspector General for Tax Administration |access-date=17 October 2022}}</ref> The following year, the IRS announced a new login and ID verification process for several of its online tools, including general account access, Identity Protection (IP) [[Personal identification number|PIN]] setup, and payment plan applications.<ref name="IRS ID 2021">{{cite web | title=New identity verification process to access certain IRS online tools and services | website=Internal Revenue Service | date=2021-11-17 | url=https://www.irs.gov/newsroom/new-identity-verification-process-to-access-certain-irs-online-tools-and-services | access-date=2022-10-17}}</ref><ref name="SADI 2022">{{cite web | last=Houston | first=Chamille | title=Tax Tip: Verifying your identity to access certain IRS systems | website=Taxpayer Advocate Service | date=2022-01-19 | url=https://www.taxpayeradvocate.irs.gov/news/tas-tax-tip-verifying-your-identity-to-access-certain-irs-systems/ | access-date=2022-10-17}}</ref> As part of the agency's Identity, Credential, and Access Management (ICAM) initiative, the process included the use of third-party [[Facial recognition system|facial recognition technologies]] to confirm taxpayer identities. The facial recognition requirement was dropped in 2022, however, following privacy concerns from government officials and the public.<ref name="IRS-Face-ID-2022">{{cite web | title=IRS announces transition away from use of third-party verification involving facial recognition | website=Internal Revenue Service | date=2022-02-07 | url=https://www.irs.gov/newsroom/irs-announces-transition-away-from-use-of-third-party-verification-involving-facial-recognition | access-date=2022-10-17}}</ref> Alternative ID verification options have since been introduced with the goal of making IRS online tools accessible to more people.<ref>{{cite news |last1=Singletary |first1=Michelle |title=Despite privacy concerns, ID.me nearly doubled the number of people able to create an IRS account |url=https://www.washingtonpost.com/business/2022/02/25/irs-idme-account-success-rate/ |access-date=17 October 2022 |newspaper=The Washington Post |date=25 February 2022}}</ref>

===History of the IRS name===
[[File:Department of Treasury retirement reception of Beth Tucker 01.JPG|thumb|right|IRS and Department of the Treasury seal on lectern]]
As early as the year 1918, the Bureau of Internal Revenue began using the name "Internal Revenue Service" on at least one tax form.<ref>Form 1040, Individual Income Tax Return for year 1918, as republished in historical documents section of Publication 1796 (Rev. February 2007), Internal Revenue Service, [[U.S. Department of the Treasury]]. Form 1040s for years 1918, 1919, and 1920 bore the name "Internal Revenue Service". For the 1921 tax year, the name was dropped, then was re-added for the 1929 tax year.</ref> In 1953, the name change to the "Internal Revenue Service" was formalized in Treasury Decision 6038.<ref>1953-2 C.B. 657 (August 21, 1953), filed with Division of the Federal Register on August 26, 1967, 18 Fed. Reg. 5120. Compare Treas. Department Order 150-29 (July 9, 1953).</ref>

==Current organization==
The 1980s saw a reorganization of the IRS. A bipartisan commission was created with several mandates, among them to increase customer service and improve collections.<ref>{{cite web |url=http://www.house.gov/natcommirs/main.htm |title=Official web site of the National Commission on Restructuring the Internal Revenue Service |publisher=House.gov |access-date=November 8, 2011 |archive-date=April 29, 2017 |archive-url=https://web.archive.org/web/20170429200455/http://www.house.gov/natcommirs/main.htm  }}</ref> Congress later enacted the [[Internal Revenue Service Restructuring and Reform Act of 1998]], which mandated that the agency replace its geographic regional divisions with units that serve particular categories of taxpayers.<ref>Pub. L. No. 105-206, 112 Stat. 685 (July 22, 1998).</ref>

As a result, the IRS now functions under four major operating divisions:
*Large Business and International (LB&I)
*Small Business/Self-Employed (SB/SE)
*Wage and Investment (W&I)
*Tax Exempt & Government Entities (TE/GE)

The Large Business & International (LB&I) division was known as the Large and Mid-Size Business division prior to a name change on October 1, 2010.<ref>IR-2010-88, August 4, 2010, "IRS Realigns and Renames Large Business Division, Enhances Focus on International Tax Administration", Internal Revenue Service, at [https://www.irs.gov/newsroom/article/0,,id=226284,00.html IRS.gov] {{Webarchive|url=https://web.archive.org/web/20120827093340/http://www.irs.gov/newsroom/article/0,,id=226284,00.html |date=August 27, 2012 }}</ref>

The IRS is [[Internal Revenue Service Building|headquartered]] in [[Washington, D.C.]], and does most of its [[computer programming]] in Maryland.<ref name="New Carrollton MD">{{cite web | title=Remarks by Secretary of the Treasury Janet L. Yellen at the IRS facility in New Carrollton, Maryland | website=U.S. Department of the Treasury | date=2022-09-15 | url=https://home.treasury.gov/news/press-releases/jy0952 | access-date=2022-10-15}}</ref> It processes paper [[Tax return (United States)|tax returns]] sent by [[United States Postal Service|mail]] and e-filed tax returns at three IRS center locations: Austin, Texas; Kansas City, Missouri; and Ogden, Utah.<ref name="IRS-Centers">{{cite web | title=Submission Processing Center Street Addresses for Private Delivery Service (PDS) | website=Internal Revenue Service | date=2016-10-26 | url=https://www.irs.gov/filing/submission-processing-center-street-addresses-for-private-delivery-service-pds | access-date=2022-10-15}}</ref>

The IRS also operates computer centers in three locations: Detroit, Michigan; Martinsburg, West Virginia; and Memphis, Tennessee.<ref>{{cite web|url=http://www.gao.gov/new.items/d11308.pdf |title=GAO-11-308 Information Security: IRS Needs to Enhance Internal Control over Financial Reporting and Taxpayer Data |access-date=November 8, 2011}}</ref>

===Commissioner===
{{main|Commissioner of Internal Revenue}}

The IRS is currently led by acting commissioner [[Michael Faulkender]], who was appointed on April 18, 2025.<ref>{{Cite web |url=https://www.wsj.com/politics/policy/trump-to-replace-acting-irs-commissioner-f5494a97 |title=Trump to Replace Acting IRS Commissioner |date=April 18, 2025}}</ref> He had become Deputy Secretary of the Treasury on March 28, 2025.

No IRS commissioner has served more than five years and one month since Guy Helvering, who served 10 years until 1943.<ref name=bloomberg1>{{cite news|title=IRS Commissioner Says He Doesn't Want Second Term|newspaper=Bloomberg|date=April 5, 2012|url=https://www.bloomberg.com/news/2012-04-05/irs-commissioner-says-he-doesn-t-want-second-term.html |last=Rubin |first=Richard }}</ref>

===Deputy commissioner===
{{update|section|date=August 2024}}
The commissioner of internal revenue is assisted by the deputy commissioner.

The deputy commissioner for operations support reports directly to the commissioner and oversees the IRS's integrated support functions, working to facilitate economy of scale efficiencies and better business practices. The deputy also administers and provides executive leadership for customer service, processing, tax law enforcement and financial management operations. Additionally, the deputy in this position assists and acts on behalf of the IRS commissioner in directing, coordinating and controlling the policies, programs and activities of the IRS. This includes establishing tax administration policy and developing strategic issues and objectives for IRS strategic management.

The deputy commissioner for services and enforcement reports directly to the commissioner and oversees the four primary operating divisions responsible for the major customer segments and other taxpayer-facing functions. The deputy commissioner for services and enforcement serves as the IRS commissioner's essential assistant acting on behalf of the commissioner in establishing and enforcing tax administration policy and upholding IRS's mission to provide America's taxpayers top-quality service by helping them understand and meet their tax responsibilities.

===Office of the Taxpayer Advocate===
{{main|Office of the Taxpayer Advocate}}
The [[Office of the Taxpayer Advocate]], also called the Taxpayer Advocate Service, is an independent office within the IRS responsible for assisting taxpayers in resolving their problems with the IRS and identifying systemic problems that exist within the IRS.<ref>{{cite web|url=http://www.irstaxreliefsettlement.com/irs-tax-attorney-los-angeles/ |title=IRS Tax Attorney Los Angeles |publisher=IRStaxreliefsettlement | access-date=2016-09-05}}</ref> The current head of the organization, known as the ''United States Taxpayer Advocate'', is Erin M. Collins.<ref>{{cite web |url=https://taxpayeradvocate.irs.gov/about/our-leadership |title=Taxpayer Advocate Service - Our Leadership |access-date=August 17, 2019 |archive-date=October 16, 2020 |archive-url=https://web.archive.org/web/20201016172748/https://taxpayeradvocate.irs.gov/about/our-leadership  }}</ref>

===Independent Office of Appeals===
{{main|Independent Office of Appeals}}
The Independent Office of Appeals is an independent organization within the IRS that helps taxpayers resolve their tax disputes through an informal, administrative process. Its mission is to resolve tax controversies fairly and impartially, without litigation.<ref name="IRS Appeals">{{citation-attribution|1={{cite web|url=https://www.irs.gov/compliance/appeals|title=Office of Appeals|publisher=US Internal Revenue Service |access-date=July 5, 2018}} }}</ref> Resolution of a case in Appeals "could take anywhere from 90 days to a year".<ref>{{cite web|url=https://www.irs.gov/compliance/appeals/what-can-you-expect-from-appeals|title=What Can You Expect from Appeals |website=Internal Revenue Service}}</ref> The current chief is Donna C. Hansberry.<ref>{{cite web|url=https://www.irs.gov/pub/irs-utl/appeals-org-structure.pdf|title=Hansberry}}</ref>

===Office of Professional Responsibility (OPR)===
{{main|Office of Professional Responsibility (IRS)}}
OPR investigates suspected misconduct by attorneys, CPAs and enrolled agents ("tax practitioners") involving practice before the IRS and has the power to impose various penalties. OPR can also take action against tax practitioners for conviction of a crime or failure to file their own tax returns. According to former OPR director Karen Hawkins, "The focus has been on [[roadkill]]{{snd}}the easy cases of tax practitioners who are non-filers."<ref>{{cite web|url=https://law.ggu.edu/press-room/profiles/alumni/karen-lee-hawkins|title=Karen Lee Hawkins|website=law.ggu.edu}}</ref> The current acting director is Elizabeth Kastenberg.<ref name="IRS OPR">{{citation-attribution|1={{cite web|url=https://www.irs.gov/tax-professionals/the-office-of-professional-responsibility-opr-at-a-glance|title=The Office of Professional Responsibility (OPR) At-A-Glance|publisher=US Internal Revenue Service |access-date=August 17, 2019}} }}</ref>

===Criminal Investigation (CI)===
{{main|IRS Criminal Investigation}}
'''Internal Revenue Service, Criminal Investigation''' ('''IRS-CI''') is responsible for investigating potential criminal violations of the U.S. [[Internal Revenue Code]] and related financial crimes, such as money laundering, currency violations, tax-related identity theft fraud, and terrorist financing that adversely affect tax administration. This division is headed by the ''[[Chief, IRS Criminal Investigation|Chief, Criminal Investigation]]'' appointed by the [[IRS Commissioner]].

===Programs===
Volunteer Income Tax Assistance (VITA) and Tax Counseling for the Elderly (TCE) are volunteer programs that the IRS runs to train volunteers and provide tax assistance and counseling to taxpayers.<ref>{{cite web |url=https://www.irs.gov/app/vita/index.jsp?level= |title=Link & Learn Taxes, linking volunteers to quality e-learning |publisher=Irs.gov |access-date=December 22, 2012 |archive-date=March 17, 2012 |archive-url=https://web.archive.org/web/20120317224701/http://www.irs.gov/app/vita/index.jsp?level=  }}</ref> Volunteers can study e-course material, take tests, and practice using tax-preparation software. Link & Learn Taxes (searchable by keyword on the IRS website), is the free e-learning portion of VITA/TCE program for training volunteers.

===Structure===
{{update|section|date=August 2024}}
*[[Commissioner of Internal Revenue]]
**Deputy Commissioner for Services and Enforcement
***Assistant Deputy Commissioner for Services and Enforcement
***'''Large Business and International Division'''{{snd}}administers tax laws governing businesses with assets greater than $10{{spaces}}million
****
***'''Small Business/Self-Employed Division'''{{snd}}administers tax laws governing small businesses and self-employed taxpayers
****Collection – collects delinquent taxes and secures filing of delinquent tax return
****Examination – reviews returns to ensure taxpayers have complied with their tax responsibilities 
****Operations Support – centralized support services
***'''Wage and Investment Division'''{{snd}}administers tax laws governing individual wage earners 
****Customer Assistance, Relationships and Education{{snd}}assist taxpayers in satisfying their tax responsibilities
****Return Integrity and Compliance Services{{snd}}detecting and preventing improper refunds
****Customer Account Services{{snd}}processing taxpayer returns
****Operations Support – internal management and support services
***'''Tax Exempt and Government Entities Division'''{{snd}}administers tax laws governing governmental and tax exempt entities
****Government Entities/Shares Services{{snd}}manages, directs, and executes nationwide activities for government entities as well as provides divisional operational support
****Employee Plans. – administers pension plan tax laws
****Exempt Organizations – determining tax exempt status for organizations and regulating the same through examination and compliance checks
***'''Criminal Investigation Division'''{{snd}}investigates criminal violations of tax laws and other related financial crimes
****International Operations – conducts international investigations of financial crimes and provides special agent attaches in strategic International locations
****Operations, Policy, and Support{{snd}}plans, develops, directs, and implements criminal investigations through regional field offices
****Refund and Cyber Crimes{{snd}}identifying criminal tax schemes and conducting cybercrime investigations
****Strategy – internal support services
****Technology Operations and Investigative Services{{snd}}management of information technology
***Office of Online Services
***Return Preparer Office
***[[Office of Professional Responsibility (IRS)|Office of Professional Responsibility]]
***[[IRS Whistleblower Office|Whistleblower Office]]
**Deputy Commissioner for Operations Support
***Assistant Deputy Commissioner for Operations Support
***Chief, Facilities Management and Security Services
***Chief Information Officer
***Chief Privacy Officer
***Chief Procurement Officer
***Chief Financial Officer
***IRS Human Capital Officer
***Chief Risk Officer
***Chief Diversity Officer
***Chief Research and Analytics Officer
**Chief of Staff
**Chief, Communications and Liaison
**[[National Taxpayer Advocate]]
**Chief Counsel
**Chief, IRS [[Independent Office of Appeals]]

==Tax collection statistics==

[[File:20220826 Share of unpaid taxes, by income level - area chart, treemap - NYTimes - Dept of Treasury.svg|thumb|U.S. Treasury Department estimates of unpaid taxes indicate that over half of all unpaid taxes are attributable to the top 5% of earners.<ref name=NYTimes_20220826>{{cite news |last1=Lopez |first1=German |last2=Wu |first2=Ashley |title=Conspiracy Theories / How more funding for the I.R.S. became a political firestorm |url=https://www.nytimes.com/2022/08/26/briefing/conspiracy-irs-tax-agency-fraud.html |work=The New York Times |date=August 26, 2022 |archive-url=https://web.archive.org/web/20220826102900/https://www.nytimes.com/2022/08/26/briefing/conspiracy-irs-tax-agency-fraud.html |archive-date=August 26, 2022 |quote=Source: U.S. Department of Treasury; Estimates from 2019 |url-status=live }}</ref>]]
Summary of collections before refunds by type of return, fiscal year 2021:<ref name="IRS 2021-2">{{cite web | title=SOI Tax Stats - IRS Data Book | website=Internal Revenue Service | url=https://www.irs.gov/statistics/soi-tax-stats-irs-data-book | access-date=2023-02-11}}</ref>
{| class="wikitable"
|-
! Type of return || Number of returns || Gross collections<br /><small>to the nearest million US$</small>
|-
| [[Income tax in the United States|Individual Income tax]] ||align="right"| 167,915,264 ||align="right"| 2,294,051
|-
| [[Federal Insurance Contributions Act tax|Employment taxes]] ||align="right"| 33,865,353 ||align="right"| 1,258,171
|-
| [[Corporate tax in the United States|Corporate income tax]] ||align="right"| 2,143,717 ||align="right"| 419,009
|-
| [[Excise tax in the United States|Excise taxes]] ||align="right"| 1,276,921 ||align="right"| 58,290
|-
| [[Gift tax in the United States|Gift tax]] ||align="right"| 282,054 ||align="right"| 4,621
|-
| [[Estate tax in the United States|Estate tax]] ||align="right"| 3,241,024 ||align="right"| 54,004
|-
| Total ||align="right"| 208,724,333 ||align="right"| 4,088,146
|}

[[File:NYC IRS office by Matthew Bisanz.JPG|thumb|[[New York City]] field office for the IRS]]

For fiscal year 2009, the U.S. Congress appropriated spending of approximately $12.624{{spaces}}billion of "discretionary budget authority" to operate the Department of the Treasury, of which $11.522{{spaces}}billion was allocated to the IRS. The projected estimate of the budget for the IRS for fiscal year 2011 was $12.633{{spaces}}billion.<ref>See Table, p. 115, ''Budget of the U.S. Government: Fiscal Year 2011'', Office of Management and Budget, Executive Office of the President of the United States (U.S. Gov't Printing Office, Washington, 2010), at [https://obamawhitehouse.archives.gov/sites/default/files/omb/budget/fy2011/assets/budget.pdf Whitehouse.gov] (PDF)</ref> By contrast, during Fiscal Year (FY) 2006, the IRS collected more than $2.2{{spaces}}trillion in tax (net of refunds), about 44 percent of which was attributable to the individual income tax. This is partially due to the nature of the individual income tax category, containing taxes collected from working class, small business, self-employed, and capital gains. The top 5% of income earners pay 38.284% of the federal tax collected.<ref>{{cite web |url=https://www.irs.gov/taxstats/indtaxstats/article/0,,id=129270,00.html#_mti  |archive-url=https://web.archive.org/web/20120806062016/http://www.irs.gov/taxstats/indtaxstats/article/0,,id=129270,00.html#_mti |archive-date=August 6, 2012 |title=SOI Tax Stats{{snd}}Individual Income Tax Rates and Tax Shares |website=irs.gov}}</ref><ref>[http://www.free-press-release.com/news/200710/1191980491.html 'New IRS Data Reveals That the Rich Really Do Pay Tax{{snd}}Lots of It'] by John Gaver. Press Release, Actionamerica.org, October 9, 2007.</ref>

As of 2007, the agency estimates that the United States Treasury is owed $354{{spaces}}billion more than the amount the IRS collects.<ref>[https://www.npr.org/templates/story/story.php?storyId=9031439 IRS Commissioner Assailed on 'Tax Gap'] by Jack Speer. [[Morning Edition]], [[National Public Radio]], March 21, 2006.</ref> This is known as the tax gap.<ref>{{cite web|url=https://www.irs.gov/newsroom/the-tax-gap|title=The Tax Gap |website=Internal Revenue Service}}</ref>

The gross tax gap is the amount of true tax liability that is not paid voluntarily and timely. For years 2008–2010, the estimated gross tax gap was $458{{spaces}}billion. The net tax gap is the gross tax gap less tax that will be subsequently collected, either paid voluntarily or as the result of IRS administrative and enforcement activities; it is the portion of the gross tax gap that will not be paid. It is estimated that $52{{spaces}}billion of the gross tax gap was eventually collected resulting in a net tax gap of $406{{spaces}}billion.<ref>{{cite web|url=https://www.irs.gov/pub/irs-soi/p1415.pdf|title=Gross tax gap|access-date=April 12, 2012}}</ref>

In 2011, 234 million tax returns were filed allowing the IRS to collect $2.4{{spaces}}trillion out of which $384{{spaces}}billion were attributed to mistake or [[tax evasion|fraud]].<ref>USA today page 1B/2B published April 12, 2012 "complex tax code raises problems for taxpayers and IRS"</ref>

===Outsourcing collection and tax-assistance===
In September 2006, the IRS started to outsource the collection of taxpayers debts to private debt collection agencies. Opponents to this change note that the IRS will be handing over personal information to these debt collection agencies, who are being paid between 29% and 39% of the amount collected. Opponents are also worried about the agencies' being paid on percent collected, because it will encourage the collectors to use pressure tactics to collect the maximum amount. IRS spokesman Terry Lemons responds to these critics saying the new system "is a sound, balanced program that respects taxpayers' rights and taxpayer privacy". Other state and local agencies also use private collection agencies.<ref>{{cite news |url=http://www.sandiegouniontribune.com/uniontrib/20060823/news_1b23irs.html |title=IRS plan for private debt collection draws criticism |work=[[The San Diego Union-Tribune]] |date=Aug 23, 2006 |access-date=Apr 30, 2016 |archive-url=https://web.archive.org/web/20160602133304/http://www.sandiegouniontribune.com/uniontrib/20060823/news_1b23irs.html |archive-date=June 2, 2016  }}</ref>

In March 2009, the IRS announced that it would no longer outsource the collection of taxpayers debts to private debt collection agencies. The IRS decided not to renew contracts to private debt collection agencies and began a hiring program at its call sites and processing centers across the country to bring on more personnel to process collections internally from taxpayers.<ref>[https://www.irs.gov/uac/IRS-Conducts-Extensive-Review,-Decides-Not-to-Renew-Private-Debt-Collection-Contracts "IRS Conducts Extensive Review, Decides Not to Renew Private Debt Collection Contracts"] {{Webarchive|url=https://web.archive.org/web/20160128123133/https://www.irs.gov/uac/IRS-Conducts-Extensive-Review,-Decides-Not-to-Renew-Private-Debt-Collection-Contracts |date=January 28, 2016 }}</ref> As of October 2009, the IRS has ceased using private debt collection agencies.

In September 2009, after [[ACORN 2009 undercover videos controversy|undercover exposé videos]] of questionable activities by staff of one of the IRS's volunteer tax-assistance organizations were made public, the IRS removed [[Association of Community Organizations for Reform Now|ACORN]] from its volunteer tax-assistance program.<ref>Wheaton, Sarah (September 23, 2008). [https://www.nytimes.com/2009/09/24/us/politics/24acorn.html "Acorn Sues Over Video as I.R.S. Severs Ties"]. ''[[The New York Times]]''.</ref>

==Administrative functions==
[[File:Figure 1 IRS Appropriations for Fiscal Years 2000 to 2019 (49395060466).jpg|thumb|upright=1.4|IRS appropriations, 2000–2019{{legend|#870f18|Nominal appropriations}}{{legend|#0c4d8f|Adjusted for inflation}}]]
The IRS publishes [[IRS tax forms|tax forms]] which taxpayers are required to choose from and use for calculating and reporting their federal tax obligations. The IRS also publishes a number of forms for its own internal operations, such as Forms 3471 and 4228 (which are used during the initial processing of income tax returns).

In addition to collection of revenue and pursuing tax cheaters, the IRS issues administrative rulings such as [[revenue ruling]]s and [[private letter ruling]]s. In addition, the Service publishes the [[Internal Revenue Bulletin]] containing the various IRS pronouncements.<ref>{{cite web|title=Internal Revenue Bulletin: 2012–23|url=https://www.irs.gov/irb/2012-23_IRB/ar08.html|publisher=Internal Revenue Service|access-date=June 7, 2012|date=June 4, 2012}}</ref> The controlling authority of regulations and revenue rulings allows taxpayers to rely on them. A letter ruling is good for the taxpayer to whom it is issued and gives some explanation of the Service's position on a particular tax issue.<ref name="irs.gov">[https://www.irs.gov/irm/part3/irm_03-028-003.html Internal Revenue Manual Section 3.28.3].</ref> Additionally, a letter ruling reasonably relied upon by a taxpayer allows for the waiver of penalties for underpayment of tax.

As is the case with all administrative pronouncements, taxpayers sometimes litigate the validity of the pronouncements, and courts sometimes determine a particular rule to be invalid where the agency has exceeded its authority. The IRS also issues formal pronouncements called Revenue Procedures. These guide taxpayers through different processes, such as correcting prior tax errors. The IRS's own internal operations manual is the [[Internal Revenue Manual]], which describes the clerical procedures for processing and auditing tax returns for almost any circumstance. For example, the Internal Revenue Manual includes special procedures for processing tax returns from the President and [[Vice President of the United States]].<ref name="irs.gov"/>

In addition to the foregoing procedures, the IRS also engages in formal rulemaking in order to provide its own formal interpretation of a statute, or when the statute itself directs that the [[United States Secretary of the Treasury|secretary of the treasury]] shall provide for such rulemaking.  The IRS initiates the formal regulation process by publishing a [[notice of proposed rulemaking]] (NPRM) in the [[Federal Register]] which announces the proposed regulation, the date of the in-person hearing, and the process for interested parties to have their views heard either in person at the hearing in Washington, D.C., or by mail. Following the statutory period provided in the [[Administrative Procedure Act (United States)|Administrative Procedure Act]] the Service decides on the final regulations "as is", or as reflecting changes, or sometimes withdraws the proposed regulations. Generally, taxpayers may rely on proposed regulations until final regulations become effective. For example, human resource professionals are relying on the October 4, 2005, Proposed Regulations<ref>[http://a257.g.akamaitech.net/7/257/2422/01jan20051800/edocket.access.gpo.gov/2005/pdf/05-19379.pdf A257.g.akamaitech.net] {{webarchive|url=https://web.archive.org/web/20060723033049/http://a257.g.akamaitech.net/7/257/2422/01jan20051800/edocket.access.gpo.gov/2005/pdf/05-19379.pdf |date=July 23, 2006 }} (PDF)</ref> (citation 70 [[Federal Register|F.R.]] 57930–57984)<ref>[http://a257.g.akamaitech.net/7/257/2422/01jan20051800/edocket.access.gpo.gov/2005/05-19379.htm Federal Register (Volume 70, Number 191)] {{webarchive|url=https://web.archive.org/web/20060819222326/http://a257.g.akamaitech.net/7/257/2422/01jan20051800/edocket.access.gpo.gov/2005/05-19379.htm |date=August 19, 2006 }}, ''October 4, 2005''</ref> for the Section 409A on deferred compensation (the so-called [[Enron]] rules on deferred compensation to add teeth to the old rules) because regulations have not been finalized.

The IRS oversaw the Homebuyer Credit and First Time Homebuyer Credit programs instituted by the federal government from 2008 to 2010. Those programs provided United States citizens with money toward the purchase of homes, regardless of income tax filings.<ref>{{cite web|url=https://www.irs.gov/uac/First-Time-Homebuyer-Credit-1|title=First-Time Homebuyer Credit |website=Internal Revenue Service}}</ref>

==Labor union==
{{further|Labor unions in the United States}}
Most non-supervisory employees at the IRS are represented by a labor union. The exclusive labor union at the IRS is the [[National Treasury Employees Union]] (NTEU). Employees are not required to join the union or pay dues. The IRS and NTEU have a national [[Collective agreement|collective bargaining agreement]].<ref>{{cite web |url=https://www.treasury.gov/tigta/foia/efoia-imds/chapter400-inv/400-exhibits/NTEU_IRS_Contract.pdf |title=2019 National Agreement: Internal Revenue Service and National Treasury Employees Union |publisher=National Treasury Employees Union |access-date=March 3, 2022}}</ref>

In pursuing administrative remedies against the IRS for certain unfair or illegal personnel actions, under federal law an IRS employee may choose only one of the three forums below:
*NTEU, or
*[[United States Merit Systems Protection Board]] (MSPB), or
*[[United States Office of Special Counsel]] (OSC).<ref>{{cite web |url=https://osc.gov/Pages/ppp-faq2.aspx |title=Prohibited Personnel Practices (PPPs) |website=osc.gov |access-date=October 21, 2018 |archive-date=July 2, 2019 |archive-url=https://web.archive.org/web/20190702090044/https://osc.gov/Pages/ppp-faq2.aspx  }}</ref>

Employees are also required to report certain misconduct to [[Treasury Inspector General for Tax Administration|TIGTA]]. Federal law prohibits reprisal or retaliation against an employee who reports wrongdoing.<ref>{{cite web | url=http://treas.gov/tigta/about_what.shtml | title = What is TIGTA | date = December 11, 2014 | work = Treasury Inspector General for Tax Administration | publisher = [[U.S. Department of the Treasury]] | access-date=October 21, 2018}}</ref><ref>{{cite web |url=https://archive.opm.gov/ovrsight/proidx.asp |title=§ 2302. Prohibited personnel practices |publisher=U.S. Office of Personnel Management |access-date=March 3, 2022}}</ref><ref>{{cite web |last=Rajesh |first=Reddy |date=February 19, 2016 |title=Tax services |url=https://pumpkintaxco.com/ai-powered-bookkeepig/ |website=Federal Register}}</ref>

==Controversies==
{{see also|List of allegations of misuse of the Internal Revenue Service}}

The IRS has been accused of abusive behavior on multiple occasions.<ref name="witness">{{cite web|url=http://enzi.senate.gov/anon1.htm|title=Prepared Statement Of Witness Before The Senate Finance Committee Oversight Hearing On The Internal Revenue Service|access-date=June 17, 2007 |archive-url = https://web.archive.org/web/20070729045147/http://enzi.senate.gov/anon1.htm<!--bot retrieved archive--> |archive-date = July 29, 2007}}</ref><ref>{{cite web|url=https://www.senate.gov/~finance/davis.htm|last=Davis|first=Robert Edwin|title=Statement before the Senate Committee on Finance|access-date=June 17, 2007 |archive-url = https://web.archive.org/web/20070209113627/https://www.senate.gov/~finance/davis.htm<!--bot retrieved archive--> |archive-date = February 9, 2007}}</ref><ref>{{cite web |url=https://www.senate.gov/~enzi/schrieb.htm |last=Schriebman |first=Robert |title=Prepared Statement of Robert S. Schrieman Before the Senate Finance Committee|access-date=June 17, 2007 |archive-url = https://web.archive.org/web/20071018072341/http://senate.gov/~enzi/schrieb.htm<!--bot retrieved archive--> |archive-date = October 18, 2007}}</ref><ref>{{cite web|url=https://www.senate.gov/~enzi/davis.htm|last=Davis|first=Shelley L.|title=Prepared Statement of Shelley L. Davis Before the Senate Finance Committee Oversight Hearing On The Internal Revenue Service|date=September 23, 1997|access-date=June 17, 2007 |archive-url = https://web.archive.org/web/20070505104053/https://www.senate.gov/~enzi/davis.htm<!--bot retrieved archive--> |archive-date = May 5, 2007}}</ref> Testimony was given before a Senate subcommittee that focused on cases of overly aggressive IRS collection tactics in considering a need for legislation to give taxpayers greater protection in disputes with the agency.

Congress passed the [[Internal Revenue Service Restructuring and Reform Act of 1998|Taxpayer Bill of Rights III]] on July 22, 1998, which shifted the [[Burden of proof (law)|burden of proof]] from the taxpayer to the IRS in certain limited situations. The IRS retains the legal authority to enforce liens and seize assets without obtaining judgment in court.<ref>See {{usc|26|6331}}. For case law on section 6331, see ''Brian v. Gugin'', 853 F. Supp. 358, 94–1 U.S. Tax Cas. (CCH) paragr. 50,278 (D. Idaho 1994), ''aff'd'', 95-1 U.S. Tax Cas. (CCH) paragr. 50,067 (9th Cir. 1995).</ref>

In 2002, the IRS accused James and Pamela Moran, as well as several others, of conspiracy, filing false tax returns and mail fraud as part of the Anderson Ark investment scheme. The Morans were eventually acquitted, and their attorney stated that the government should have realized that the couple was merely duped by those running the scheme.<ref>{{Cite news|url=https://www.seattletimes.com/seattle-news/couple-acquitted-of-tax-fraud/|title=Couple acquitted of tax fraud|date=2008-01-04|work=The Seattle Times|access-date=2017-11-16|language=en-US}}</ref>

In 2004, the law licenses of two former IRS lawyers were suspended after a federal court ruled that they defrauded the courts so the IRS could win a sum in tax shelter cases.<ref>{{Cite news|url=https://www.nytimes.com/2004/08/21/business/2-ex-irs-lawyers-licenses-suspended-for-misconduct.html|title=2 Ex-I.R.S. Lawyers' Licenses Suspended for Misconduct|last=Johnston|first=David Cay|date=2004-08-21|work=The New York Times|access-date=2017-11-16|language=en-US|issn=0362-4331}}</ref>

In 2013, the Internal Revenue Service became embroiled in a [[IRS targeting controversy|political scandal]] in which it was discovered that the agency subjected [[Conservatism in the United States|conservative]] or conservative-sounding groups filing for tax-exempt status to extra scrutiny,<ref name="washingtonpost1">{{cite news|url=https://www.washingtonpost.com/politics/obama-denounces-reported-irs-targeting-of-conservative-groups/2013/05/13/a0185644-bbdf-11e2-97d4-a479289a31f9_print.html |title=IRS officials in Washington were involved in targeting of conservative groups |newspaper=The Washington Post |access-date=May 15, 2013}}</ref> though liberal groups were also targeted.<ref>{{cite news |url=https://www.nytimes.com/2017/10/26/us/politics/irs-tea-party-lawsuit-settlement.html |title=Justice Department Settles With Tea Party Groups After I.R.S. Scrutiny |last=Cochrane |first=Emily |date=October 26, 2017 |work=[[The New York Times]] |access-date=June 1, 2023}}</ref>

On September 5, 2014, 16 months after the scandal first erupted, a Senate Subcommittee released a report that confirmed that Internal Revenue Service used inappropriate criteria to target Tea Party groups, but found no evidence of political bias.<ref>{{cite web|last1=Korte|first1=Gregory|title=Senate subcommittee: No political bias in IRS targeting|website=[[USA Today]]|url=https://www.usatoday.com/story/news/politics/2014/09/05/senate-subcommittee-report-on-irs-tea-party-targeting/15130715/|access-date=September 10, 2014}}</ref> The chairman of the Senate Permanent Subcommittee on Investigations confirmed that while the actions were "inappropriate, intrusive, and burdensome", the Democrats have often experienced similar treatment.<ref>{{cite web|last1=The Permanent Subcommittee On Investigations|title=RS and TIGTA Management Failures Related to 501(c)(4) Applicants Engaged in Campaign Activity|url=https://www.documentcloud.org/documents/1283995-report-irs-amp-tigta-mgmt-failures-related-to/|access-date=September 10, 2014}}</ref> Republicans noted that 83% of the groups being held up by the IRS were right-leaning; and the Subcommittee Minority staff, which did not join the Majority staff report, filed a dissenting report entitled, "IRS Targeting Tea Party Groups".<ref>{{cite web|last1=The Subcommittee Minority|title=IRS Targeting Tea Party Groups|url=https://ahelp.com/wp-content/uploads/2025/01/psi-report-irs-tigta-mgmt-failures-related-to-501-c-4-minority-dissenting-views.pdf|access-date=September 10, 2014}}</ref>

On May 25, 2015, the agency announced that over several months criminals had accessed the private tax information of more than 100,000 taxpayers and stolen about $50{{spaces}}million in fraudulent returns.<ref>{{cite web|first1=Kaveh|last1=Waddell|access-date=2020-11-22|title=The IRS Hack Was Twice as Bad as We Thought|url=https://www.theatlantic.com/technology/archive/2016/02/the-irs-hack-was-twice-as-bad-as-we-thought/471255/|date=26 February 2016|website=The Atlantic}}</ref> By providing Social Security numbers and other information obtained from prior computer crimes, the criminals were able to use the IRS's online "Get Transcript" function to have the IRS provide them with the tax returns and other private information of American tax filers.<ref>{{cite news|last1=Steinberg|first1=Joseph |title=IRS Leaked Over 100,000 Taxpayers' Private Info To Criminals: What You Need |url=https://www.forbes.com/sites/josephsteinberg/2015/05/26/irs-leaked-over-100000-taxpayers-info-to-criminals-what-you-need-to-know/|access-date=May 27, 2015|work=[[Forbes]]}}</ref> On August 17, 2015, IRS disclosed that the breach had compromised an additional 220,000 taxpayer records.<ref>{{cite news|last=Weise |first=Elizabeth |title=IRS hack far larger than first thought |url=https://www.usatoday.com/story/tech/2015/08/17/irs-hack-get-transcript/31864171/ |publisher=USA Today |access-date=August 17, 2015 |date=August 17, 2015 }}</ref> On February 27, 2016, the IRS disclosed that more than 700,000 Social Security numbers and other sensitive information had been stolen.<ref>{{cite news |title=Massive IRS data breach much bigger than first thought |url=http://www.cbsnews.com/news/irs-identity-theft-online-hackers-social-security-number-get-transcript/ |publisher=[[CBS News]] |access-date=April 18, 2016 |date=April 18, 2016 }}</ref><ref>{{cite news|access-date=2020-11-22|title=Hack Brief: Last Year's IRS Hack Was Way Worse Than We Realized|url=https://www.wired.com/2016/02/irs-hack-700000-accounts/|newspaper=Wired|issn=1059-1028 }}</ref><ref>{{cite web|first1=Kevin|last1=McCoy|access-date=2020-11-22|title=Cyber hack got access to over 700,000 IRS accounts|url=https://www.usatoday.com/story/money/2016/02/26/cyber-hack-gained-access-more-than-700000-irs-accounts/80992822/|website=USA TODAY}}</ref>

The Internal Revenue Service has been the subject of frequent criticism by many elected officials and candidates for political office, including some who have called to abolish the IRS. Among them were [[Ted Cruz]], [[Rand Paul]], [[Ben Carson]], [[Mike Huckabee]], and [[Richard Lugar]].<ref>{{cite news|title=A world with no IRS? Really |publisher=[[CNN Money]] |url=https://money.cnn.com/2015/11/04/pf/taxes/abolish-the-irs/|access-date=February 11, 2020 |date=November 4, 2015 }}</ref> In 1998, a Republican congressman introduced a bill to repeal the Internal Revenue Code by 2002.<ref>{{cite web|title=How the IRS Was Gutted |url=https://www.propublica.org/article/how-the-irs-was-gutted |publisher=[[ProPublica]] |access-date=February 11, 2020 |date=December 11, 2018 }}</ref> In 2016, The [[Republican Study Committee]], which counts over two-thirds of House of Representatives Republicans as its members, called for "the complete elimination of the IRS", and Republican representative [[Rob Woodall]] of Georgia has introduced a bill every year since he entered Congress in 2011 to eliminate income taxes and abolish the IRS. As of 2016, support for Woodall's bill has grown to 73 co-sponsors.<ref>{{cite news|title=Conservatives in Congress urge shutdown of IRS |publisher=Reuters |url=https://www.reuters.com/article/us-usa-taxes-congress/conservatives-in-congress-urge-shutdown-of-irs-idUSKCN0XT0TF |access-date=February 11, 2020 |date=May 2, 2016}}</ref>

In 2022, Representative [[Matt Gaetz]] of Florida introduced a bill to disarm the IRS after the agency had drawn public attention for a $700,000 purchase of ammunition.<ref>{{Cite web |last=Jones |first=Kelly |date= July 18, 2022 |title=Yes, the Internal Revenue Service did buy nearly $700K in ammunition in early 2022 |url=https://www.cbs8.com/article/news/verify/government-verify/internal-revenue-service-did-buy-nearly-700k-in-ammunition/536-0ce9f538-a372-4c26-8013-1ab4e571578c |access-date=August 4, 2022 |website=cbs8.com |language=en-US}}</ref><ref>{{Cite web |last=Gaetz |first=Matt |date=2022-07-01 |title=Text - H.R.8268 - 117th Congress (2021-2022): Disarm the IRS Act |url=http://www.congress.gov/ |access-date=2022-08-04 |website=www.congress.gov}}</ref>

Over 20,000 taxpayers were erroneously marked as deceased in 2022. This prevents taxpayers from filing their taxes or receiving their refunds.<ref>{{Cite web |title= |url=https://www.tigta.gov/sites/default/files/reports/2023-08/202340044fr.pdf |archive-url=http://web.archive.org/web/20240108211022/https://www.tigta.gov/sites/default/files/reports/2023-08/202340044fr.pdf |archive-date=2024-01-08 |access-date=2025-01-06 |website=www.tigta.gov}}</ref> 

The IRS has been criticized for its reliance on [[legacy software]]. Systems such as the [[Individual Master File]] are more than 50 years old and have been identified by the [[Government Accountability Office]] as "facing significant risks due to their reliance on legacy programming languages, outdated hardware, and a shortage of human resources with critical skills".<ref>{{cite report|author=United States Government Accountability Office|author-link= United States Government Accountability Office|date=28 June 2018|title=IRS Needs to Take Additional Actions to Address Significant Risks to Tax Processing|url=https://www.gao.gov/products/GAO-18-298|id=GAO-18-298}}</ref>

Critics have accused the IRS of failing to protect confidential taxpayer information. In one incident, thousands of tax returns were leaked without authorization, due to information security failures.<ref>{{Cite web |last=mbracken |date=2024-08-21 |title=IRS still faces security challenges in aftermath of taxpayer data leak |url=https://fedscoop.com/irs-taxpayer-data-leak-security-privacy-tigta-report/ |access-date=2025-01-06 |website=FedScoop |language=en-US}}</ref> Internal government reports have also indicated that sensitive information stored on microfilms has not been kept secure or properly recorded, creating security risks for taxpayers.<ref>{{Cite web |title= |url=https://www.tigta.gov/sites/default/files/reports/2023-08/2023ier008fr.pdf |archive-url=http://web.archive.org/web/20241214141643/https://www.tigta.gov/sites/default/files/reports/2023-08/2023ier008fr.pdf |archive-date=2024-12-14 |access-date=2025-01-06 |website=www.tigta.gov}}</ref>

In May 2024, the Senate Finance Committee took a closer look at whether the IRS failed to control a tax break offered by the Puerto Rico government, known as ''[[Act 22 of 2012|Act 22]]'' to attract the wealthy in Puerto Rico.<ref>{{Cite web |last=Cioffi |first=Chris |date=2024-05-28 |title=IRS Policing of Puerto Rico Perk for Rich Eyed in Senate Probe |url=https://news.bloomberglaw.com/daily-tax-report/irs-policing-of-puerto-rico-perk-for-rich-eyed-in-senate-probe |access-date=2024-05-28 |website=www.bloomberglaw.com}}</ref>

==See also==
{{Portal|United States|Politics|Economics}}
*[[HM Revenue and Customs]], the UK equivalent
*[[Canada Revenue Agency]], the Canadian equivalent
*[[IRS penalties]]
*[[Tax evasion in the United States]]

==References==
{{reflist}}

*{{USGovernment|url=https://www.irs.gov}}
*{{USGovernment|url=https://www.jct.gov}}

==Further reading==
*{{cite book
 |last1=Davis
 |first1=Shelley L.
 |last2=Matalin
 |first2=Mary
 |title=Unbridled Power: Inside the Secret Culture of the IRS
 |url=https://archive.org/details/unbridledpowerin0000davi
 |year=1997
 |publisher=[[HarperCollins]]
 |location=New York
 |isbn=0-88730-829-5
 |url-access=registration
 }}
*{{cite book
 |last=Johnston
 |first=David Cay
 |author-link=David Cay Johnston
 |title=Perfectly Legal: The Covert Campaign to Rig Our Tax System to Benefit the Super Rich – and Cheat Everybody Else
 |url=https://archive.org/details/perfectlylegalco00john_0
 |year=2003
 |publisher=Portfolio
 |location=New York
 |isbn=1-59184-019-8
 }}
*{{cite book
 |last=Rossotti
 |first=Charles O.
 |title=Many Unhappy Returns: One Man's Quest to Turn Around the Most Unpopular Organization in America
 |url=https://archive.org/details/manyunhappyretur00char
 |year=2005
 |publisher=[[Harvard Business School Press]]
 |location=Cambridge
 |isbn=1-59139-441-4
 }}
*{{cite book
 |last1=Roth
 |first1=William V. Jr.
 |author-link1=William V. Roth, Jr.
 |last2=Nixon
 |first2=William H.
 |title=The Power to Destroy
 |url=https://archive.org/details/powertodestroy00will
 |year=1999
 |publisher=Atlantic Monthly Press
 |location=New York
 |isbn=0-87113-748-8
 }}

==External links==
{{commons category|United States Internal Revenue Service}}
*[https://www.irs.gov Internal Revenue Service Official website]
*[https://www.federalregister.gov/agencies/internal-revenue-service Internal Revenue Service] in the ''[[Federal Register]]''
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{{US Treasury agencies}}
{{Authority control}}

[[Category:Internal Revenue Service| ]]
[[Category:1862 establishments in the United States]]
[[Category:Financial regulatory authorities of the United States]]
[[Category:Government agencies established in 1953]]
[[Category:Revenue services]]
[[Category:Tax investigation]]
[[Category:Tax terms]]
[[Category:Taxation in the United States]]