How can I get a copy of my organization's exemption letter? You can download copies of original determination letters (issued January 1, 2014 and later) using our on-line search tool Tax Exempt Organization Search (TEOS). To otherwise request a copy of the original determination letter, submit Form 4506-B, Request for a Copy of Exempt Organization IRS Application or Letter PDF using email feature on form. You can also fax Form 4506-B to 855-204-6184 or mail to: Internal Revenue Service Attn: Correspondence Unit P.O. Box 2508, Room 6-403 Cincinnati, OH 45201 It may take 60 days or longer to process your request. You may also request an affirmation letter using Form 4506-B. The affirmation letter serves the same purpose for grantors and contributors as the original determination letter. If you are a subordinate organization under group exemption ruling, contact the central organization that holds the group ruling to obtain confirmation of your status as a member of the group. See Publication 4573 PDF, Group Exemptions, for more information.