Get your taxes done using TurboTax

Let me clarify: I haven't filed my taxes, I have to mail them in. When I went to the portal to fill out the form in lieu of mailing out my taxes, the form was rejected because the IRS said that my SS number was already used in this year's taxes. This is concerning because, as far as I know, I didn't file my taxes unless TurboTax automatically transmitted them for the stimulus program. Otherwise, I will need to worry about a stolen identity. So does TurboTax automatically transmit your federal taxes for the stimulus program regardless of what you actually need to do to officially file your taxes i.e., mail them in?