I'm running TurboTax Deluxe CD/Download on Windows 11 right now. There isn't a separate Windows 11 version; TurboTax CD/Download Windows for 2021 will work on Windows 8.1 & up. See https://ttlc.intuit.com/community/system-requirements/help/minimum-system-requirements-for-turbotax-... .
If you bought the CD but can't install that because you don't have a CD drive, download instructions are at https://ttlc.intuit.com/community/installing/help/i-bought-the-cd-but-my-computer-doesn-t-have-a-cd-... .
