Your return was NOT accepted ... it was rejected ... it must be fixed and refiled. The rejection message you have indicates a return in your SS# has already been filed ... did you possibly file an early registration non filer return for the stimulus check ???
Did you submit your information through one of the non-filer applications in order to get your stimulus payment? There are non-filer options either through TurboTax or the IRS.
If so, when using the non-filer system, your information is processed by the IRS as an original filed return.
If not, then you may have a more serious identity theft issue to address.
See the following TurboTax articles for some additional advice about your situation:
Reject R0000-902-01: Taxpayer TIN must not be the same as a previously accepted return
What to do if you suspect tax-related identity theft
