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What does IRB stand for?

IRB stands for Internal Revenue Bulletin (Internal Revenue Service)

This definition appears very frequently and is found in the following Acronym Finder categories:

  • Military and Government
  • Business, finance, etc.

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We have 112 other meanings of IRB in our Acronym Attic

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See also section 448 of the Internal Revenue Code; Notice 2001-76 in Internal Revenue Bulletin 2001-52; and IRS Publication 538, Accounting Periods and Methods.