Only 2018 and newer years have full upgrades (and state downloads) available in order to read the .taxyyyy datafiles you may have. So if your old computer is still working, make sure you create a) a filing copy PDF for that year, and b) a second full PDF file with all worksheets of those years (certainly 2017 and earlier...I thought 2018 was still available now..but might disappear by October) Then just transfer those PDF files to the new computer for those early years.....the PDFs will not be editable/workable, but at least you will be able to read all your data at any time. You will likely not be able to get a fully working copy of the 2017 and earlier software that works with your data files, even if you can install that year's software (There can exceptions for some folks, but it depends on the situation for each person...i.e not having a state to file, AND already having a late/fully updated copy of the installation software.)
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
