Note:
Internal Revenue Manual Part 25. Special Topics · 2026-10-03 edition · updated 2026-10-04 · United States
If a closing letter was issued by RIVO already (e.g., Letter 4310), do not issue a duplicate closing letter, unless it has been more than 30 days and/or the RIVO Letter 4310C did not provide a response to all of the actions taken on the account.
(4) Case closed with a TC 971 506
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Send a closing Letter 4674C
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