Get your taxes done using TurboTax

The IRS is requesting we amend our 2020 tax filing. We filed with turbo tax Home and Business, downloaded the State of CA originally. I cannot even open my 2020 .Tax turbo tax file as I get stuck on the download State loop (error 190) and the "We hit a snag" error. I want to be able to amend the file, print and mail the amendment to the IRS as requested. Is that possible?