Intuit has an offer to switch your desktop license to online premium Fed+State at no extra cost. It will come up on the installer and check the offer terms. But be aware online is not the same functionality as desktop, in particular there is no forms mode (you can review 1040 + Sched 1/2/3 directly any time, the rest of the forms you need to pay (or apply your license from this offer) to see the full return in PDF), and you can only prepare 1 return per account so this offer is only good for 1 return (Fed+State). You also can't switch it back to desktop later. You can also try out online regardless and input some data to see how it works before committing, just "Sign in to Turbotax" using one of the buttons on this website.
If you are savvy with VMs and can spin up Win 11 in a VM on your Win 10 machine, Turbotax will work there.
Otherwise your options in the desktop space are HR Block and TaxAct still supporting Win 10 for 2025.
