Internal Revenue Service

The Internal Revenue Service (IRS) is the revenue service of the federal government of the United States responsible for administering and enforcing the nation's federal tax laws. Operating as a bureau of the United States Department of the Treasury, the IRS is responsible for collecting federal taxes, processing tax returns, administering tax credits and refunds, and ensuring compliance with the Internal Revenue Code. Established in its modern form in 1953, the agency traces its origins to the Office of the Commissioner of Internal Revenue, created in 1862 during the American Civil War to administer the first federal income tax. Headquartered in Washington, D.C., the IRS serves individuals, businesses, nonprofit organizations, trusts, estates, and other taxpayers throughout the United States.

The IRS administers a broad range of federal taxes, including individual and corporate income taxes, employment taxes, excise taxes, estate and gift taxes, and certain international tax obligations. Its principal responsibilities include processing tax returns, issuing refunds, collecting tax revenues, auditing taxpayers, investigating tax evasion, assessing penalties, and providing taxpayer assistance. The agency also administers taxpayer identification systems, oversees tax-exempt organizations, and manages electronic filing programmes that process millions of tax returns annually. Through regulatory guidance, revenue rulings, notices, and publications, the IRS interprets and implements federal tax legislation enacted by Congress.

In addition to tax administration, the IRS plays a significant role in supporting public finance and economic policy through the implementation of tax incentives, economic relief programmes, and information reporting systems. It administers tax credits related to education, healthcare, retirement savings, renewable energy, and low-income households, while also implementing temporary fiscal measures enacted during periods of economic disruption. The agency collaborates with domestic and international authorities to combat tax fraud, offshore tax evasion, money laundering, and abusive tax avoidance schemes, including through information-sharing agreements and international tax compliance initiatives.

The Internal Revenue Service works closely with organizations including the United States Department of the Treasury, the Financial Crimes Enforcement Network (FinCEN), the U.S. Securities and Exchange Commission (SEC), the Federal Bureau of Investigation (FBI), the Organisation for Economic Co-operation and Development (OECD), and tax authorities in foreign jurisdictions. Through tax administration, compliance enforcement, taxpayer services, and international cooperation, the IRS plays a central role in financing the operations of the United States federal government and maintaining the integrity, fairness, and efficiency of the nation's tax system.