If the returns were rejected when you tried to e-file, you received emails telling you why the returns were rejected. At this point, it does not matter, since it is too late to e-file them. The only way to file a 2020 or 2021 return is by mail. And any refunds have been forfeited. If you owe tax due, it is still owed with late filing penalties and interest. You cannot print them unless you paid your TurboTax fees. Did you pay your fees?
you cannot e-file those years. it is too late to claim a refund for 2020 that had to be file by 5/17/2024. it is too late to claim a refund for 2021 unless it was properly extended. without a proper extension the deadline to claim a refund was 4/15/2025. with a proper extension the deadline is 10/15/2025. if you owe there is no deadline, but Turbotax no longer supports 2020. for 2021 you would need the desktop app since online preparation is closed
https://turbotax.intuit.com/personal-taxes/past-years-products/2021/