The Internal Revenue Bulletin (IRB) is the authoritative instrument for announcing official rulings and procedures of the IRS and for publishing Treasury Decisions, Executive Orders, Tax Conventions, legislation, court decisions, and other items of general interest.

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Internal Revenue Bulletin 2011-49 12/02/2011
Internal Revenue Bulletin 2011-48 11/24/2011
Internal Revenue Bulletin 2011-47 11/18/2011
Internal Revenue Bulletin 2011-46 11/11/2011
Internal Revenue Bulletin 2011-45 11/04/2011
Internal Revenue Bulletin 2011-44 10/28/2011
Internal Revenue Bulletin 2011-43 10/21/2011
Internal Revenue Bulletin 2011-42 10/14/2011
Internal Revenue Bulletin 2011-41 10/07/2011
Internal Revenue Bulletin 2011-40 09/30/2011
Internal Revenue Bulletin 2011-39 09/28/2011
Internal Revenue Bulletin 2011-38 09/16/2011
Internal Revenue Bulletin 2011-37 09/10/2011
Internal Revenue Bulletin 2011-36 09/02/2011
Internal Revenue Bulletin 2011-35 08/26/2011
Internal Revenue Bulletin 2011-34 08/19/2011
Internal Revenue Bulletin 2011-33 08/12/2011
Internal Revenue Bulletin 2011-32 08/05/2011
Internal Revenue Bulletin 2011-31 07/29/2011
Internal Revenue Bulletin 2011-30 07/22/2011
Internal Revenue Bulletin 2011-29 07/15/2011
Internal Revenue Bulletin 2011-28 07/08/2011
Internal Revenue Bulletin 2011-27 07/01/2011
Internal Revenue Bulletin 2011-26 06/24/2011
Internal Revenue Bulletin 2011-25 06/17/2011

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