It's too late to get a refund for 2021. If you are amending your 2021 tax return to get an additional refund you can file the amended return, but you will not get the refund.
TurboTax desktop software for 2021 is no longer supported. If you have it installed on your computer it will still work, but you cannot install it now.
If you have a working installation of the 2021 TurboTax software, but you do not have the .tax2021 data file for your tax return, you could recreate the tax return using a transcript or copy that you get from the IRS. Then you could use the recreated return as the starting point for preparing an amended return.
If you do not have a working installation of the 2021 TurboTax software, you might be able to get software for 2021 from another tax software company. You would then have to start by recreating your original 2021 tax return with the new software. Or you could go to a local tax professional to prepare an amended return for you.
