Body A Closer Look A detailed look at IRS issues affecting taxpayers and the tax system. The Commissioner's Section Meet the Commissioner of Internal Revenue. The Agency, its Mission and Statutory Authority The Internal Revenue Service is the nation's tax collection agency and administers the Internal Revenue Code enacted by Congress. IRS Strategic Plan The IRS Strategic Plan is a roadmap to guide IRS operations and to meet the changing needs and expectations of our nation's taxpayers and tax professionals who serve them IRS History Timeline The history of the IRS includes many events that shaped our nation. The IRS History timeline is not comprehensive, but meant to provide highlights on the evolution of our American tax system, from the 1700’s to the present. As you browse through this timeline, you will see the dedication of the Internal Revenue Service’s employees and our ongoing commitment to service and to all taxpayers. Today's IRS Organization Our organizational structure closely resembles the private sector model of organizing around customers with similar needs. Equity, Diversity and Inclusion at IRS The IRS has a strong and steadfast commitment to ensuring equity, diversity and inclusion are integrated into the policies, procedures and practices used to carry our mission. Criminal Enforcement In support of the overall IRS Mission, Criminal Investigation serves the American public by investigating potential criminal violations of the Internal Revenue Code and related financial crimes in a manner that fosters confidence in the tax system and compliance with the law. Budget Documents and Other Resources Find Budget Documents, the Priority Guidance Plan and other guidelines and policies. Open Government Initiative The IRS is committed to Open Government.