It depends.
Did you file using the non-filer registration tool to register for the stimulus payment? If so, you will need to mail your tax return in.
Switch from E-file to mail
If this is not the case, please see the following information from the IRS if you believe someone filed a tax return using your social security number.
Reporting suspected tax fraud
You will not be able to e-file your return if you are getting a message indicating your information has already been reported on a return filed. You will need to mail your tax return in.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"