Sorry you can not use the Desktop License Code for the Online version. You can only install the Desktop program on 5 Windows 11 or Mac computers you own. You can use the Online version on the Windows 10 computer but you need to set up a new Turbo Tax account and it won't be connected to your Desktop program or returns.
The Desktop program only stores the returns on that single computer. You can't access Desktop returns from another computer or device .
