Code 370: account transfer-in i/b:.
From IRS Document 6209, the IRS's processing codes manual.
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Document 6209 says
Debit. Used on individual (IMF) accounts.
Account Transfer-in I/B:
The full Document 6209 entry, as printed
Debit (PJ) I/B Account Transfer-in I/B: 52 All: 51 Transfers a tax module from Retention Register to Master File. Posts all accompanying transactions input as a part of the transaction. This transaction shows assessments, abatements, credits and debits which are being transferred to an account on the MF. The list of valid transactions are shown in IRM 3.17.21. If transaction goes unpostable with UPC 171, Master File will not show TC 370. 370 Prompt, Quick and Jeopardy Assessments Doc. Code 51 includes all prompt, quick and jeopardy assessment transactions.
After code 370
Not enough shared timelines with this code yet. The block fills in once 30 people with code 370 share theirs from the result page.
Crowd figures, not IRS data. They describe what happened to others, not a promise.
Questions people ask
What does code 370 mean on my IRS transcript?
Document 6209 calls it "Account Transfer-in I/B:".
Sources
Checked against these sources on October 30, 2026.