A duplicate return error usually means the IRS has already accepted a tax return using your Social Security number (SSN).
This can happen for a few reasons, and it doesn’t always mean fraud—but it’s important to check right away.
First steps to take
Before assuming identity theft, start with these checks:
Confirm you entered your SSN correctly on your return
Make sure you didn’t already file your return:
Through another tax platform
With a different tax preparer
If you already filed your return another way, you’re all set—no further action is needed.
What if I didn’t file anywhere else?
If you’re confident you didn’t file another return, someone else may have used your information to file fraudulently.
In that case, the IRS recommends these steps:
1. Complete Form 14039
Form 14039, Identity Theft Affidavit, tells the IRS that your personal information may have been used without your permission.
2. File a paper return
Print your tax return, attach the completed Form 14039, and mail both to the IRS.
You can find the correct mailing address using the IRS guidance for where to file paper returns.
Even if identity theft is suspected, the IRS recommends continuing to file and pay your taxes, including by paper if needed.
Getting a copy of a fraudulent return
If you believe a fraudulent return was filed in your name, you can request a copy for your records.
The IRS provides instructions for requesting a copy of a fraudulent return, which can be helpful when communicating with the IRS.
Additional next steps
The IRS may also recommend requesting a copy of the fraudulent return using Form 4506-F, Request for a Copy of a Fraudulent Tax Return.
This form is submitted by mail or fax and can help you keep documentation on file while the issue is being resolved.
Key takeaway
A duplicate return error means the IRS already has a return on file using your SSN. If you didn’t file elsewhere, act quickly—file Form 14039, submit a paper return, and follow IRS guidance to protect your identity.
If you need more help, you can contact the IRS Identity Theft Helpline directly.
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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