Note:
Internal Revenue Manual Part 4. Examining Process · 2026-10-03 edition · updated 2026-10-04 · United States
The exam group manager (or designee) reviews the 30-Day Letter package and, if needed, discusses concerns with the examiner. The manager may make suggestions for revision of the 30-Day Letter package. The group manager emails the examiner an approved final 30-Day Letter package.
The examiner will then mail the approved 30-Day Letter package to the taxpayer (and POA if applicable) by certified mail.
The examiner will then update the case to status 13 (30-Day) through RCCMS (with the AIMS box checked) immediately after mailing the 30-Day Letter to the taxpayer.
Use the most current version of the 30-Day Letter. See the table below for which letter to use for specific case types, and the acceptable RCCMS naming convention to use:
Exam Issue
Use Letter
RCCMSnaming convention
Acceptablevariations
Forms 1040/1120 - Discrepancy Adjustments (Including all Form 5329 adjustments)
3605
3.L3605 TAX DISC ADJ
- L3605 date
Forms 5330 or 990-T
2005
3.L 2005 30-Day Form 5330
3.L2005 30-Day Form 5330 date
Proposed Non-Qualification or Revocation
1756
3.L 1756 30-Day Proposed Non-Qual or Revocation
3.L1756 30-Day Proposed Non-Qual or Rev. (as appropriate) date
Claim Disallowance without Additional Tax
3602
3.L3602 30-Day Claim Denied
3.L3602 30-Day Claim Denied date
Claim Disallowance with Additional Tax
3602-B
3.L3602-B 30-Day Claim Denied
3.L3602-B 30-Day Claim Denied date
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