Code 577: reversal of tc 576.
From IRS Document 6209, the IRS's processing codes manual.
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Document 6209 says
Credit. Used on individual (IMF) accounts.
Reversal of TC 576
The full Document 6209 entry, as printed
Credit (PJ) I Reversal of TC 576 Generated Transaction Generated by TC 300, 571, 572 or TC 421 with Doc. Code 47 and Disposal Code 20-25, 27, 29, 31-33, 35 or 36. Restores TC 576 Unallowable Tax into the tax module and releases 576 hold.
After code 577
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Questions people ask
What does code 577 mean on my IRS transcript?
Document 6209 calls it "Reversal of TC 576".
Sources
Checked against these sources on October 30, 2026.