File your return with your IP PIN in the same way you normally would, but include the PIN number when prompted by tax software or when filling out Form 1040 by hand

An IP PIN (Identity Protection Personal Identification Number) is a six-digit code the IRS sends you if you have been a victim of identity theft or if the IRS suspects your Social Security number has been compromised. The PIN is required on your federal tax return — without it, the IRS will reject your return. You do not file a separate form or take a different route; you simply enter the PIN where the tax software or paper form asks for it.

The PIN changes every year. The IRS mails it to you in a letter, usually in late December or early January. If you do not receive it by mid-January, you can retrieve it through your IRS online account or by calling the IRS directly. Once you have the PIN, filing your return is the same process as always — the only difference is that one field now requires a number instead of being blank.

Key Takeaways

  • Your IP PIN is a six-digit number required on your federal tax return if the IRS has issued one to you; the return will be rejected without it.
  • The IRS mails your IP PIN to your address on file, usually in late December or early January, and the number changes every tax year.
  • You can retrieve your current IP PIN through your IRS online account at irs.gov or by calling the IRS Identity Theft Hotline at 1-800-908-4490.
  • When filing, enter your IP PIN in the designated field on Form 1040 (line 7d) or when prompted by tax software; leaving it blank or entering the wrong number will cause rejection.
  • If you file by mail, write your IP PIN clearly on the form; if you file electronically, the software will ask for it as part of the standard filing process.

Where to find your IP PIN if you did not receive the letter

The IRS sends your IP PIN by mail to the address it has on file for you. If you moved recently or the letter was lost, you have two ways to retrieve it without waiting for a replacement letter.

The fastest method is to log into your account at irs.gov using your username and password (or by creating one if you do not have an account). Once logged in, go to "View Your Tax Account" and look for the section labeled "IP PIN." The number will be displayed there. This method works as long as you can verify your identity through the IRS login system.

If you cannot access your online account or prefer to speak with someone, call the IRS Identity Theft Hotline at 1-800-908-4490. Have your Social Security number, date of birth, and filing status ready. The IRS representative will verify your identity and provide your current IP PIN over the phone. Wait times are typically shorter early in the morning or later in the afternoon.

How to enter your IP PIN on your tax return

If you file electronically using tax software, the program will prompt you for your IP PIN as part of the standard filing process. Look for a field labeled "IP PIN" or "Identity Protection PIN" — it usually appears near the top of the return or in a security section. Enter all six digits exactly as they appear on your IRS letter. If you enter the wrong number or leave the field blank when you have an IP PIN, the IRS will reject your return and send it back to you.

If you file by paper, write your IP PIN on Form 1040, line 7d. This line is specifically for the IP PIN and appears in the upper right section of the form. Write the number clearly in the boxes provided. Mail your return to the address listed in the Form 1040 instructions for your state.

Do not include your IP PIN anywhere else on the return — only in the designated field. Including it in other places or in a cover letter can cause processing delays.

What happens if you file without your IP PIN when you need one

If the IRS has issued you an IP PIN and you file your return without it, the IRS will reject the return automatically. You will receive a notice in the mail explaining that the return was rejected because the IP PIN was missing or incorrect. The notice will tell you to file again with the correct PIN.

When you receive this notice, do not panic — your return has not been processed, so no refund has been delayed yet. Simply correct the return by adding your IP PIN and file again. If you filed electronically, you can file an amended return (Form 1040-X) with the correct PIN. If you filed by paper, you can mail a corrected Form 1040 with the PIN filled in. Include a note explaining that this is a corrected return due to a missing IP PIN.

The IRS will process the corrected return once it arrives. Processing times are the same as for any other return — typically 21 days for electronic returns and longer for paper returns. Your refund timeline resets from the date the corrected return is received, not from the date you originally filed.

Your IP PIN changes every year

The IRS issues a new IP PIN to you every January for the upcoming tax year. You cannot reuse last year's PIN — each year requires a new six-digit number. The IRS mails the new PIN to your address on file in late December or early January.

If you do not receive your new PIN by mid-January, retrieve it through your online IRS account or call the Identity Theft Hotline. Do not assume you do not need a PIN just because you did not receive a letter; if you had an IP PIN last year, you will have one this year as well.

If your IP PIN is lost or you forgot it

You can retrieve your current IP PIN at any time through your IRS online account or by calling 1-800-908-4490. You do not need to request a replacement letter — the number is available immediately through either method. Keep your PIN in a safe place once you have it, since you will need it to file your return.

If you have already filed your return and then realized you used the wrong PIN or forgot to include it, contact the IRS as soon as possible. The sooner you file a corrected return, the sooner the IRS can process it and issue your refund if one is due.

Frequently Asked Questions

Do I need an IP PIN if I have never been a victim of identity theft?

Only if the IRS has sent you one. The IRS issues IP PINs to people whose Social Security numbers have been flagged in their system as potentially compromised, even if you have not noticed fraud yourself. If you receive an IP PIN letter, you must use it to file. If you have not received one, you do not need one.

What if I file my return before I receive my IP PIN in the mail?

Do not file until you have your PIN. If you file without it when the IRS expects one, your return will be rejected. Retrieve your PIN through your online IRS account or by calling 1-800-908-4490 first, then file. It takes only a few minutes to get the number, and it prevents rejection and delays.

Can I file my taxes if I lost my IP PIN letter?

Yes. You do not need the physical letter — you only need the six-digit number. Log into your IRS account at irs.gov or call 1-800-908-4490 to retrieve it. Both methods will give you the number immediately so you can file right away.

Will using my IP PIN slow down my refund?

No. Filing with your IP PIN does not change processing times. Electronic returns are processed in about 21 days, and paper returns take longer. The PIN is simply a security requirement — it does not add steps or delay your refund.

What if the IRS says my IP PIN is invalid when I try to file?

Double-check that you entered all six digits correctly and in the right order. If you are certain the number is correct, call the IRS at 1-800-908-4490 to confirm your current PIN. It is possible the number changed or you have the previous year's PIN by mistake.