it is your 2020 return that determines your stimulus payments. The tax returns for 2017-2019 don't matter.
BUT
if another joint return was filed for 2020 with your name on it, you won't be able to e-File
Instead you would mail it in, with a filing status of SINGLE.
IRS will sort it out.
Don't file any other forms suggested above if you don't want to.
E-Filing will end Oct 15.
also you don't need any income to file a tax return for the stimulus payments.
