Are you using 2023 Online or the 2023 Desktop program? Yes you need each year's Desktop program to open a .taxyyy file. Or about the only thing you can do with tax files is you can transfer the prior year file into the next year's return. Like Transfer 2022 into a 2023 return either Online or Desktop.
If you don't need to see the actual entries, You could try the TaxPrinter service (not connected with Turbo Tax) to convert a .tax file to pdf at
http://www.taxprinter.com
