Get your taxes done using TurboTax

so I think you mean you had Win 10, and then accepted the offer to switch that license to online, completed a return online and in doing so used the license code for the Online Premium edition?

 

if that is the case that license has been used for online which only allows 1 return per account, but not interchangeable back to desktop.  to do more returns now on desktop under Win 11 you would have to purchase a new license.