i won't provide the Turbotax support number. log in to your 2021 account and there you should find a contact link with an 800 phone number.
this could be a scam or could be real.
if someone has filed a return using your SSN, even if fraudulent but accepted, you still have to file your return. what you won't be able to do is e-file. include form 14039 with your mailed return and be sure to use a mailing method where you get proof of delivery.
if you can e-file and it's accepted that means that you're the first one to file using your SSN.
