Code 299: abatement of prior tax assessment interest computation date.
From IRS Document 6209, the IRS's processing codes manual.
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Document 6209 says
Credit. Used on individual (IMF) accounts.
Abatement of Prior Tax Assessment Interest Computation Date
The full Document 6209 entry, as printed
Credit (NPJ) I/B Abatement of Prior Tax Assessment Interest Computation Date 54 Used to input an abatement of tax to a module which contains a TC 150. Generates abatement of interest and FTP penalty from the interest computation date which must be included in the transaction. BMF: Can be used with another tax adjustment code on the same document (record) but is not acceptable with TC 294 or 295. Can be used with penalty codes and interest transaction codes. Otherwise same as TC 291. IMF: Same as TC 291. Will resequence until interest computation date is earlier than current 23C date. BMF: Will unpost (UPC 497, RC2) with secondary TC data later than current 23C date.
After code 299
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Questions people ask
What does code 299 mean on my IRS transcript?
Document 6209 calls it "Abatement of Prior Tax Assessment Interest Computation Date".
Sources
Checked against these sources on October 30, 2026.