Letter 4464C· Examination / audit
Letter 4464C — Return integrity hold
- Category
- Examination
- Urgency
- Informational
- Response window
- see notice
- Key form
- —
No action required — retain it with your records.
Why the IRS sent this
IRS internal selection criteria for verification of income / withholding accuracy.
Response window
The IRS detail page for Letter 4464C does not state a fixed day count. The response-by date is printed on your individual notice — read the date at the top-right corner.
What to do
Required action
No action is required by the letter itself. The IRS asks taxpayers to wait at least 60 days from the letter date before calling about refund status.
Appeal path
Informal — call the IRS
Informal — Taxpayer Advocate Service if hardship applies. File Form 14039 only if identity theft is suspected.
Notes from the primary source
The 60-day figure on the IRS detail page is a wait-before-calling guideline, NOT a taxpayer response deadline. The letter itself requires no action — the IRS is performing review work.
Calm-corrective
Only the IRS can resolve your notice
We are not a CPA firm, not a law firm, not an Enrolled Agent firm, and not affiliated with the IRS. We don't accept payments on your behalf, settle your debt, or call the IRS for you. What we do: explain what your notice means, point you to the right IRS form, cite the statute that authorizes the action, and surface the appeal path. Then you call the number on the notice, file the form, or hire a licensed professional.
Related notices
Likely next or sibling codes
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- CP75Audit notice for refundable credits (typically the Earned Income Credit, Additional Child Tax…
- CP79Notification that one or more refundable credits (EITC, AOTC, CTC, ACTC, ODC) were disallowed in…
Source
Verified against the official IRS detail page on irs.gov/individuals/understanding-your-letter-4464c. Always re-verify against the IRS page before acting.