Wrapping up my federal return, e file will not go as its has an error and states a return using my social security number has already been filed? what do i do now?

[fanfare]

answer will depend on whether you used the non-filers portal at www.irs.gov to enter EIP information.

[xmasbaby0]

If you used the IRS non-filer site to get a stimulus check, you will now get a  “duplicate SSN” rejection.  We are seeing people who did not notice or ignored the warning on that site about using it if they would be filing a tax return.

https://ttlc.intuit.com/community/tax-topics/help/stimulus-how-to-file-your-return-after-getting-rej...

If -- instead-- someone claimed you as a dependent or used your SSN on a return (even accidentally) the only way you can file your tax return is to print, sign and mail it.

Rejections for duplicate Social Security numbers come from the IRS and you cannot defeat the or fix the rejection and e-file.

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.