I filed a return and received an error message that another return had been filed with this tax ID. I assume it is referring to the 2019 tax year. Now I am attempting to e-file the final year1/1/20 through 4/30/20.
"... Now I am attempting to e-file the final year1/1/20 through 4/30/20."
so.... you'd have to use 2020 software. Which, to my knowledge is not yet available. Nor are the 2020 forms. I'd suggest an extension, in hopes the forms *might* become available at IRS.Gov.