if you have the tax data files for tax years 2020 and 2021, those can only opened with the TurboTax software for each of those years. The tax data files will have a file extension of .tax2020 for tax year 2020 and .tax2021 for tax year 2021.
The TurboTax software for 2020 and 2021 can be purchased and downloaded from this TurboTax website - https://turbotax.intuit.com/personal-taxes/past-years-products/
Or go to this IRS website for free federal tax return transcripts - https://www.irs.gov/individuals/get-transcript
For a fee of $43 you can get a complete federal tax return from the IRS by completing Form 4506 - http://www.irs.gov/pub/irs-pdf/f4506.pdf
