I think for tax year 2020 you need to delete form 1310 in Turbo Tax and print the pdf for form 1310 direct from the IRS. Here is a link:
https://www.irs.gov/pub/irs-pdf/f1310.pdf
Because the taxpayer is deceased you cannot e-file. You need to file by mail and include IRS form 1310 to verify your claim to the refund.
Turbo Tax claims form 1310 hasn’t been finalized yet but the IRS website shows the final revision dated October 2020. It does not indicate any more revisions are coming for form 1310.
