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 3.12.21.4.2.13(10), above, to identify the originator (to whom the Form 4227 (and document) should be sent for research and correction).
If the Doc Code is 51, Field 01-I must be a debit (signed positive) or zero.
If the Doc Code is 52, Field 01-I must be zero.
If Field 01-I underprints, see IRM 3.12.21.12.1.
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