The reject code means that your Social Security number has already been used to e-file a return. The IRS has a database that tracks every SSN used to e-file, so it can spot duplicates.
This might be caused by one of a couple of things:
1. You accidentally e-filed already. Did TurboTax tell you that your return was Accepted at some point? If so, you can't resubmit it again, but you must amend the return if you have to make changes. If this is the case, come back and ask us for How to Amend.
2. Someone else filed for you. Unfortunately, this is how tax identity thieves operate - they steal your name, birthdate, and SSN and fake a return to get a fat refund. If this is the case, you need to see this IRS website (bottom half of the page).
So check to see if TurboTax thinks you had already e-filed.
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