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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Boletín Publicado
Internal Revenue Bulletin 2013-20 05/09/2013
Internal Revenue Bulletin 2013-19 06/27/2013
Internal Revenue Bulletin 2013-18 04/25/2013
Internal Revenue Bulletin 2013-17 04/18/2013
Internal Revenue Bulletin 2013-16 04/11/2013
Internal Revenue Bulletin 2013-15 04/04/2013
Internal Revenue Bulletin 2013-14 03/28/2013
Internal Revenue Bulletin 2013-13 03/21/2013
Internal Revenue Bulletin 2013-12 03/14/2013
Internal Revenue Bulletin 2013-11 03/07/2013
Internal Revenue Bulletin 2013-10 02/28/2013
Internal Revenue Bulletin 2013-09 02/22/2013
Internal Revenue Bulletin 2013-08 02/14/2013
Internal Revenue Bulletin 2013-07 02/07/2013
Internal Revenue Bulletin 2013-06 01/31/2013
Internal Revenue Bulletin 2013-05 01/24/2013
Internal Revenue Bulletin 2013-04 01/18/2013
Internal Revenue Bulletin 2013-03 01/10/2013
Internal Revenue Bulletin 2013-02 01/10/2013
Internal Revenue Bulletin 2013-01 01/15/2013
Internal Revenue Bulletin 2012-52 12/20/2012
Internal Revenue Bulletin 2012-51 12/16/2012
Internal Revenue Bulletin 2012-50 12/06/2012
Internal Revenue Bulletin 2012-49 11/29/2012
Internal Revenue Bulletin 2012-48 11/23/2012

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