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MFT-CD 13 has to be calendar year with Reference Number 628.

Reminder:

Internal Revenue Manual Part 3. Submission Processing · 2026-10-03 edition · updated 2026-10-04 · United States

Follow the table/procedures in IRM 3.12.21.5.2.2(5) above to identify the originator (to whom the Form 4227 (and document) should be sent for research and correction).

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▸Contents — Internal Revenue Manual Part 3. Submission Processing
Internal Revenue Manual Part 3. Submission Processing

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