I had the same problem. In my case, I had accidentally selected to print / file the state estimated tax payment vouchers....which are listed in TurboTax list of forms as "unsupported". It just meant I had to deselect (or delete those in forms mode). Once I did that, I was able to print and file my state return.
I will try to paste the link to that state form list here:
https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_states_online_individual.h...
