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
If Field 41-B underprints, check to see if the amounts in Field 41-B and Field 41-D are in each other's field. Field 41-D will always be larger than Field 41-B. If they are, switch Field 41-B and Field 41-D. If Field 41-B re-underprints, either reject or send to Accounting.
If Field 41-B underprints and a State Code Field has an invalid credit reduction state, see Exhibit 3.12.21-9, Credit Reduction Chart, to correct any transcription errors.
If unable to determine the Credit Reduction State, reject with Action Code 3.
Prepare Form 4227, notating, "Credit Reduction state invalid" .
Attach Form 4227 to the document and route them to the originator for research and/or correction.
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