MFT-CD 13 has to be calendar year with Reference Number 628.›Reminder:
Field 01-G - Original Assessment Transaction Code (or, "Transaction Code of Original…
Internal Revenue Manual Part 3. Submission Processing · 2026-10-03 edition · updated 2026-10-04 · United States
The Original Assessment Transaction Code is found in Item G (Section 01), Page 1, Form 3413. It is also located under the TC (Transaction Code) column (Line 31) of the Form 3552.
This field will appear invalid if it is not one of the codes shown in the correct chart Exhibit 3.12.21-5, Valid IMF Transaction Code Table, through Exhibit 3.12.21-7, BMF Valid Transaction Code Table.
This field will appear invalid if it does not contain a Transaction Code that is valid for the doc code and MFT being processed.
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