here's a link to the minimum Windows system requirements
https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-system-requirements/minimum-syst...
I have 2018 through 2022 installed and they all run on my W10 OS with a 4000 series CPU (kind of old)
note that Turbotax only makes available updates for the current and prior 3 years. after that, once you uninstall the app and try reinstalling it will not be available and the Cds that are advertised for sale for older years are beta versions which you won't be able to update and no state returns will be available. while the programs are only available for this period if you use online then TurboTax only keeps the last 6 or 7 years as does the IRS after that they're permanently gone. if you use the desktop app, then Turbotax does not have any copies whatsoever only the IRS for the period specified
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the best thing you can do is save the entire return worksheets and all as a PDF on your computer and then a backup copy on a thumb or flash drive. you'd be surprised at the number of threads about taxpayers wanting older returns but they've changed computers, deleted the files, hard drives went bad, etc. that's the reason for a backup.
