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The Internal Revenue Code (IRC), formally the Internal Revenue Code of 1986, is the domestic portion of federal statutory tax law in the United States, published in various volumes of the United States Statutes at Large, and separately as Title 26 of the United States Code (USC). It is organized topically, into subtitles and sections, covering income tax in the United States, payroll taxes, estate taxes, gift taxes, and excise taxes; as well as procedure and administration. The Code's implementing federal agency is the Internal Revenue Service.