if my return is rejected due to my social security being used to file already what should I do? if I know my social wasn’t used to file?

[xmasbaby0]

You cannot overcome a rejection for duplicate use of a SSN.   Print, sign and date your return in ink, and let the IRS sort out the duplicate use of your SSN.

When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s.  Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS/state received the return.

Federal and state returns must be in separate envelopes and they are mailed to different addresses.  Read the mailing instructions that print with your tax return carefully so you mail them to the right addresses.

[DaveF1006]

I think what you mean is that your Social Security Number was used in another filing. This possibly means one of three things.

1.  You were claimed as a dependent by someone else on their tax return.
2. Perhaps an ex-spouse filed Married Filing Jointly on their return to claim a bigger refund.
3. Your Social Security Number was fraudulently used by someone posing to be you. 

Here is what you should do.

File by Paper (Immediately)

1. The IRS e-file system will continue to reject your return, so you must mail a paper return.
2. Print your completed tax return.
3. Sign and date it.
4. Include a brief cover letter or the rejection notice you received.

Pro Tip: Write "Rejected Electronic Return - [Date]" in red at the top of the first page to help the agent processing it understand why you aren't e-filing.

2. Alert the IRS (Form 14039)

1. You need to officially notify the IRS that you are a victim of identity theft. 
2. Fill out IRS Form 14039, Identity Theft Affidavit.
3. Attach this form to the back of your paper tax return.
4. Include a copy of a government-issued ID (like your driver's license or passport) to prove you are who you say you are.

If you need extra time, filing an extension by April 15, 2026, moves your submission deadline to October 15. But remember any taxes owed are still due in full by the original April 15 date.