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Identity verification

IRS Letter 4883C

Call the IRS to verify your identity and your return

Respond by

The date printed on the letter

Who sent it

IRS
Facts on this page come from that IRS page, last updated by the IRS Jul 20, 2026; read by TaxScout Oct 19, 2026.

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What this letter asks of you, what to gather, and what to ask a professional if you need one. No phone number asked.

What this letter means

The IRS received a Form 1040-series return filed under your SSN or ITIN and, to protect you from identity theft, needs you to verify your identity and the return by phone before processing continues.

The IRS holds your return until you confirm it was you who filed it.

What to do

  1. 1Call the Taxpayer Protection Program hotline shown in your 4883C letter.
  2. 2Have ready the 4883C letter, the Form 1040-series return it references, a prior-year return if you filed one, and supporting documents such as Form W-2, Form 1099, Schedule C or Schedule F.
  3. 3If a representative calls for you, they need Form 2848 on file; otherwise you must call together.
  4. 4If you cannot verify by phone, schedule an appointment and bring the documents to a local IRS office.
  5. 5If you did not file the return, tell the IRS immediately; you may be a victim of identity theft.
  6. 6Do not file Form 14039, Identity Theft Affidavit, if you received this letter; follow the letter's instructions instead.

If you do nothing

Until you verify, the IRS will not process your tax return, issue refunds, or credit any overpayment to your account.

Is this letter real?

The hotline is for identity and return verification only and cannot give refund status; the IRS page points to Publication 5027, Identity Theft Central and the IP PIN program.

Check the notice number against the official IRS site before you respond, and respond only to the address or number printed on the official page.

Common questions

What is IRS Letter 4883C?

The IRS received a Form 1040-series return filed under your SSN or ITIN and, to protect you from identity theft, needs you to verify your identity and the return by phone before processing continues. The IRS page for it is titled 'Understanding your letter 4883C'.

How long do I have to respond to Letter 4883C?

The IRS page for this notice does not state a fixed number of days. Use the date printed on your letter, and act before it.

What happens if I ignore Letter 4883C?

Until you verify, the IRS will not process your tax return, issue refunds, or credit any overpayment to your account.

Is Letter 4883C a scam?

The hotline is for identity and return verification only and cannot give refund status; the IRS page points to Publication 5027, Identity Theft Central and the IP PIN program.

Do I need a CPA for Letter 4883C?

Not always. Upload the letter and the free report explains what it asks for and what to gather; if a professional makes sense, the report says why and what to ask. TaxScout never shares your request with any firm unless you ask for that on the report.

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Not tax advice. TaxScout is not the IRS. Deadlines and steps above are quoted from the IRS page linked at the top and may change; the letter in your hand controls.