The "not entitled to file a formset" error happens during the filing process when the state preparation fee has not been paid for. Deleting the state and starting it over will resolve the issue. You will need to go through the complete state interview and review to then be prompted to purchase the State preparation fees in the "Review Your Order" screen. Once paid for and completed you will be able to e-file your state returns without error.
Please see the TurboTax FAQ below for more information and instructions on how to delete your State return in TurboTax Online:
https://ttlc.intuit.com/replies/3301384