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  1. Tax code, regulations and official guidance - Internal Revenue …

  2. U.S. Code: Title 26 | U.S. Code | US Law | LII / Legal Information ...

  3. INTERNAL REVENUE CODE - House

  4. Internal Revenue Code - Wikipedia

  5. How the U.S. Tax Code Works and Its Sections - Investopedia

  6. Internal Revenue Code

  7. U.S. Code Title 26. Internal Revenue Code | FindLaw

  8. 26 U.S. Code Chapter 1 - NORMAL TAXES AND SURTAXES

  9. 26 U.S. Code Part I - TAX ON INDIVIDUALS | U.S. Code | US Law …

  10. Internal Revenue Code (IRC): Definition, What It Covers, History