MFT-CD 13 has to be calendar year with Reference Number 628.›Reminder:
Fields 01-M and 01-N - Reference Number and Reference Number Amount
Internal Revenue Manual Part 3. Submission Processing · 2026-10-03 edition · updated 2026-10-04 · United States
The Reference Number must be a three-digit numeric field. This data is necessary to allow the automatic transfer of certain civil penalties, using Doc Code 51 or 52 into MFTs 02, 05, 13, 30, 31, 51, 52, and 55.
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