@colospgs5735 the Win 10 decision was announced 6 months ago and emails went out, not sure why you didn't get those or see this issue before now; it was also very clear in the system requirements for the s/w.
I can't speak for Intuit but it's clearly a business decision not just technical limitation, due to the liability of incomplete security updates on an OS which is out of technical support, and their projection of low usage not justifying the testing and support, and Intuit's strategic direction is clearly towards online as desktop is very low revenue and in decline; other s/w providers made a different decision. See blog post here from last year.
https://ttlc.intuit.com/community/articles/community-news-announcements/turbotax-windows-10-desktop-...
you can request a refund here and have to use something else if online or VM doesn't work you
https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-refunds/request-refund-turbotax-p...
