Select File by Mail to bypass the state forms. Of course, you don't have to file by mail. Selecting this just allows you to bypass the e-file prompts.
But it might charge you for a state return. To not pay for state now you have to delete it. How to delete the state,
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-delete-my-state-return-in-turbotax-online/00/25895