If you bought and installed the 2019 program there would have been a warning that for the 2020 program you would need an upgraded system. Don't know how much more of a warning you need to have. Before you buy any programming in the future please take a moment to see what OS is needed to run it.
For now you can return the program you cannot use for a full refund. https://ttlc.intuit.com/community/charges-and-fees/help/our-turbotax-satisfaction-guaranteed-refund-...
You do have the option to use the ONLINE version instead : https://turbotax.intuit.com/personal-taxes/online/preparing-to-file-taxes/
If you qualify you can use one of the 10 IRS FREE FILE options to file a fed & state return for free ... but you must log in thru the IRS site :
https://www.irs.gov/filing/free-file-do-your-federal-taxes-for-free
For Filing Season 2021, you must make $72,000 or below to use one of the 10 IRS Free File partner offers.
