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How do I fix a Social Security number already used rejection?

Explains why the IRS rejects a return when a Social Security number (SSN) or Individual Taxpayer Identification Number (ITIN) was already used to file a return, how to confirm whether a duplicate filing occurred, and what to do next in april.

Updated this week

Why did I get this rejection?

The IRS has already accepted a tax return for this tax year using your Social Security number (SSN) or Individual Taxpayer Identification Number (ITIN).

This usually happens for one of three reasons:

  • There was a typo or transposed number when your SSN or ITIN was entered

  • You or someone you know already filed a return for you

  • Someone else filed a fraudulent return using your SSN or ITIN

Because the IRS only allows one e-filed return per SSN or ITIN each year, they won’t accept another electronic filing with the same number.


How to fix the rejection

There are a few things you can check to get this sorted. Start with the steps below, then resubmit your return in april if needed:

Double-check your SSN or ITIN

Start by confirming the number you entered.

  • Review your SSN or ITIN carefully in april

  • Look for swapped digits or missing numbers

  • Make sure the number matches your Social Security card or IRS records

If you find a mistake and correct it, you can resubmit your return electronically.


Make sure you haven’t already filed

Before taking next steps, confirm that a return wasn’t already filed for you.

  • Check whether you filed earlier using another tax software or a Tax Pro

  • Confirm that a spouse, partner, or family member didn’t file on your behalf

If a return was already filed, you don’t need to file again.


If your information is correct and you didn’t file

If your SSN or ITIN is correct and you’re sure no one filed a return for you, the IRS won’t allow e-filing for this tax year.

Your next step is to file by mail.


How to file by mail

  • Print your completed tax return

  • Sign and date it

  • Attach required forms, such as W-2s

  • Mail it to the IRS using their paper filing instructions

Paper filing takes longer, but it allows the IRS to process your return when e-file isn’t available.


What if this could be identity theft?

If you believe someone filed a return using your Social Security number or ITIN without your permission, the IRS has specific steps to help protect your account and resolve the issue.

Taking these steps helps protect your tax account and future filings.


This content is provided for informational purposes only and should not be construed as tax, legal, financial, accounting, or other advice. Rules and regulations vary by location and are subject to change, so please consult with an expert if you need advice specific to you.

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