Note:
Internal Revenue Manual Part 4. Examining Process · 2026-10-03 edition · updated 2026-10-04 · United States
The IRC has no provision for filing income tax abatement requests. There is only a final closing letter for abatements disallowed in full or in part; no 30-day letter. IRC 6404(b).
Drafted 30-day Letter similar to Letter 5182 or Letter 5183, whichever applies, but used only for income tax.
Form 4549
Form 886-A
Agreed Closing Letter (issued by group)
Any Abatements with Additional Tax
Letter 2511
Copy of Signed Form 4549
Unagreed Closing Letter
Abatements Disallowed in Full or in Part Only:
Letter 693, Check 1st box for partial disallowance. Check the 2nd or 3rd box for full disallowance, issued by the group.
Form 4549, no signature required.
Form 886-A
90-day SNOD Issued by Mandatory Review or Appeals
Chapter 41 and 42 Excise Taxes Abatements Disallowed in Full, Abatements Disallowed in Part, or Abatements Disallowed with Additional Adjustment:
Form 4720
Form 4720-A
Form 990-PF
Form 990-BL
Report (issued by group)
All IRC 4962 Abatement of Chapter 42 Tax Only:
30-day letter, Disallowed in Full, or
30-day letter, Disallowed in Part
Form 870-E for either letter above
Form 4621 for either letter above
Form 4883 for either letter above
Form 886-A for either letter above
30-day letter, Disallowed in Full or
30-day letter, Disallowed in Part
Form 886-A with either letter
N/A, No 30-day letter or report. Final closing letter only.
Drafted 30-day letter similar to Letter 5183, but used only for Chapter 41 or 42 Excise Tax.
Form 870-E
Form 4621
Form 4883
Form 886-A
Agreed Closing Letter (issued by group)
All IRC 4962 Abatement of Chapter 42 Tax Only:
30-day Letter – Partial Abatement – IRC 4962 Copy of Signed Form 870-E
Letter 2511
Copy of Signed Form 870-E
N/A, No 30-day letter or report. See unagreed closing letters.
Letter 2511
Copy of Signed Form 870-E
Unagreed Closing Letters
All IRC 4962 Abatement of Chapter 42 Tax Only:
30-day letter becomes final (unless Appealed) or
Examination Reconsideration Letter – Full Denial, Closing Letter for improper IRC 4962 Abatement Request; issued by group or
Letter 924, if applicable, issued by group or
Letter 693, if applicable. Edit out 1st sentence of 2nd paragraph that mentions "income tax." Check the 3rd box, issued by group
30-day letter becomes final (unless appealed)
Letter 693, Edit out 1st sentence of 2nd paragraph that mentions "income tax." Check the 1st box for partial disallowance. Check the 2nd or 3rd box for full disallowance; issued by group.
Form 4621
Form 4883
Form 886-A
Letter 924, issued by Group (Non-4962) or
Letter 693, Edit out 1st sentence of 2nd paragraph that mentions "income tax." Check the 3rd box, issued by group
90-day SNOD issued by Mandatory Review or Appeals.
Miscellaneous Excise Taxes - Abatements Disallowed in Full, Abatements Disallowed in Part or Abatements Disallowed with Additional Adjustment:
Form 11-C
Form 730
Report (issued by group)
Abatements Disallowed in Full or in Part - NOT an examination reconsideration:
Letter similar to 30-day letter – Full Denial – IRC 4962 or
Letter similar to Closing Letter – Partial Abatement – IRC 4962
Form 5384 with either letter above
Form 886-A with either letter above
N/A, No 30-day letter or report. Final closing letter only
Drafted 30-day letter similar to Letter 5183, but used only for miscellaneous excise tax.
Form 5384
Form 886-A
Agreed Closing Letter (issued by group)
Abatements Disallowed in Full or in Part - NOT an examination reconsideration:
Letter 2511
Copy of signed Form 5384
N/A, No 30-day letter or report. See unagreed closing letters.
Letter 2511
Copy of Signed Form 5384
Unagreed Closing Letters
Abatements Disallowed in Full or in Part - NOT an examination reconsideration:
30-day letter, becomes final (unless appealed)
Drafted letter similar to Letter 693, but without the 1st sentence of the 2nd paragraph that mentions "income tax." Check the 1st box for partial disallowance. Check the 2nd or 3rd box for full disallowance.
Copy of Form 5384
Copy of Form 886-A
90-day SNOD issued by Mandatory Review or Appeals
Letter 924, or
Letter 693, but without 1st sentence of 2nd paragraph that mentions "income tax." Check the 3rd box.
Employment Taxes - Abatements Disallowed in Full Abatements Disallowed in Part or Abatements Disallowed with Additional Adjustment:
Form 940
Form 941-X
Form 944-X
Form 945-X
Report (issued by group)
Letter 5182, 30-day letter, or
Letter 5183, 30-day letter
Form 2504, correct version, with Letter 5183 only
Form 4666, with Letter 5183 only
Form 4667, with Letter 5183 only
Form 4668, with Letter 5183 only
Form 4668-B, with Letter 5183 only
Form 886-A, with either letter above
Pub 5, with either letter above
Pub 594, with either letter above
Closing Letter
Letter 5154, closing letter when taxpayer fails to respond or provide sufficient information or abatement not considered on its merits, or previous adjustment is reduced.
Copy of Signed Form 2504 if agreed
Copy of Form 4666
Copy of Form 4667
Copy of Form 4668
Copy of Form 4668-B
Pub 5
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