@2manyyear- The error stems from a legacy utility being removed from Windows 11, which TurboTax Desktop previously to use to generate the unique machine id (UMID). We have already updated TurboTax to remove the code that used the removed utility. However, if you installed TurboTax before it was updated (and after the legacy utility was removed), then the proper UMID was not associated with the license. Changing the TTConfig.ini file forces the software to use whatever was used in place of the UMID.
If you don't see a UMID file , then please contact our phone support team for more assistance.
