As posted above, the TurboTax FAQ below has information that will help when you are being prompted to enter your activation code every time you sign in:
TurboTax 2019 and TurboTax 2020 requests license activation at every launch
The link below will help and explain the 607 error code:
Error code 607: License Information not found for the given licenseID
Please see this TurboTax help topic below for assistance with error code 605:
My code doesn't work
If you’re still having trouble with your code, Contact us . The best and most efficient way for you to connect with the right person to get the help you need is to select the version you are using below. Use the web form and type your question or a keyword. You will get an appropriate phone number for your issue. (You will not get a phone number if you use the link outside of operating hours.) We're open daily from 5:00 AM to 9:00 PM PT.
