MFT-CD 13 has to be calendar year with Reference Number 628.
Note:
Internal Revenue Manual Part 3. Submission Processing · 2026-10-03 edition · updated 2026-10-04 · United States
You may also consult either the MFT-Reference-Number Table (in this subsection) or Exhibit 3.12.21-8 (Reference Numbers) to confirm the valid MFT/Reference Number information.
If a Reference Number is found, enter it in Field 01-M.
If one is not found, use the table above to determine the correct Reference Number and enter in Field 01-M.
If you can't readily determine the correct Reference Number, use your local procedures to correct the problem.
IMPORTANT: If there is a Reference Number (Field 01-M), there must be a Reference Number Amount (Field 01-N). If either is present, they must both be present.
If there is a Reference Number or Reference Number Amount, there must be both.Field 01-N, Reference Number Amount, is a numeric not to exceed 13 digits. If there is a Reference Number present and no Reference Number Amount, search the document and attachments for a valid reference amount.
If a Reference Number Amount is found, enter it in Field 01-N.
If a valid reference amount can't be found, reject the document with Action Code 3.
Notate on Form 4227, "Reference Number Amount missing or incorrect" .
Attach the 4227 to the document and route to Accounting (for contact with the originator for research and/or correction).
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