btw this topic has been going here for months, seems unlikely at this point 3 months from filing that Intuit will reverse course
It's not millions of users affected. Total desktop users is about 4 mil (compared to 35 mil 'units' for online/live services) and we don't know split but Mac market share in is 25% and Win 10 share of Windows in US has dropped from 2/3 to 1/3 over the course of the year. So theoretically 4mil * 0.75 * 0.33 = 1mil Win 10 users. But the true number is likely already lower as Intuit announced months ago they would not support it which would have given some users a reason to move to Win 10 sooner than later.
In their last earnings, Intuit reported a 4% decline in desktop and cited 'loss of market share for low average revenue per return users' i.e. they are apparently fine losing desktop users as long as online revenue is growing. Whether Intuit's projections on user losses for Win 10 work out right or wrong we'll see but it won't affect the bottom line much either way. Desktop revenue is $200mil which is not nothing, but only 1% of Intuit's revenue, and only 5% of total Turbotax revenue.
Anyway - you can try writing to Intuit to make your voice heard, but then your options remain - to upgrade to Win 11 (ESU only 9 months to go tho I understand wanting to see what happens and not upgrading just for Turbotax); use a Win 11 VM; use online; use something else - HRB and TaxAct are supporting Win 10.
More chat on this here since August and many other threads and no doubt more to come
https://ttlc.intuit.com/community/taxes/discussion/turbotax-desktop-2025-will-not-be-compatible-with...
Good luck
