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 3.12.21.5.2.2(5) above to identify the originator (to whom the Form 4227 (and document) should be sent for research and correction).
Tax Liability Carryback Transaction Code Table - Debit Transaction Code with Credit Transaction Code
(Debit)
(Credit)
290
295
290
299
294
291
298
291
300
309
308
301
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