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Our research libraries offer a vast collection of source documents.


Easily locate your source documents in our collection of primary source materials:

  • Internal Revenue Code of 1986
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  • Treasury decisions
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  • Revenue procedures
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Research a vast collection of court opinions — containing more than 100,000 decisions with parallel citations from the:

      • U.S. Supreme Court
      • U.S. courts of appeals
      • U.S. district courts
      • U.S. Tax Court (regular, memoranda, and summary decisions)
      • U.S. bankruptcy and bankruptcy appellate panel courts
      • U.S. Court of Federal Claims
      • U.S. Board of Tax Appeals

Know the IRS agents and officers’ administrative and operational policies and procedures, with the entire Internal Revenue Manual available to the public.

Federal Research Library

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Continually updated to reflect the latest documents and decisions


  • Quickly see the latest additions to the library with our What’s New feature
  • Find esoteric tax documents, with the complete legislative history of all acts affecting the Internal Revenue Code from the 97th Congress (1981), including:

      • Recent legislation
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      • JCT blue books
  • Access to TaxPractice on the Web, a weekly publication offering in-depth coverage and analysis of legislative tax proposals, court decisions, regulatory pronouncements, and new trends in the administration of tax law
  • Searchable Archives

      • Code section
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      • Rulings
      • Internal Revenue Manual archived quarterly editions back to 2001
      • IRS publications
      • TaxPractice from January 1999 to the present

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