Each tax year is a separate program so to open the tax data file for a prior year you would need the TurboTax program for that year.
The tax data files, which have a file extension of .taxyyyy where yyyy is the tax year, eg .tax2021 for tax year 2021.
The tax data files and all saved PDF's are stored, by default, in the TurboTax folder in the Documents directory on the old computer. These you would have copy from the old computer and store on the new computer.
