Code 550: waiver extension of date collection statute expires.
From IRS Document 6209, the IRS's processing codes manual.
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Document 6209 says
Used on individual (IMF) accounts.
Waiver Extension of Date Collection Statute Expires
The full Document 6209 entry, as printed
I/B Waiver Extension of Date Collection Statute Expires 77 Extends the Collection Statute Expiration Date to the data input with this transaction. For IMF only, an optional CSED TIN indicator (P) Primary, (S) Secondary, or (B) Both can be used to identify which taxpayer the extension applies to. TC550-Definer-CD required with TC 550 input. See 2.4.19-5(Cont 24) item 31 for values and meanings.
After code 550
Not enough shared timelines with this code yet. The block fills in once 30 people with code 550 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 550 mean on my IRS transcript?
Document 6209 calls it "Waiver Extension of Date Collection Statute Expires".
Sources
Checked against these sources on October 30, 2026.