TurboTax might not support all required forms to be electronically filed therefore if might not let you e-file.
To view a full list of all forms within your return, see the link below. You will need to pay TurboTax fees to view all forms and schedules.
How do I preview my TurboTax Online return before filing?
Then check forms availability using the link below
When will my individual tax forms be available in TurboTax?
If the form says it's Unsupported, it means that it is not supported by TurboTax, and you won't be able to file it electronically; instead you will have to print and mail either the form itself or the whole return.
