If you already started a state return, you can delete it as long as you haven't paid for it yet (or registered your free version with the state attached).
If you plan to eventually file a state return, just not right now, you can skip it and file only your federal return. However, if you wish to e-file your state, you'll be able to do so only after your e-filed federal return has been accepted.
You can file your federal return and skip your state return for now. Please see the TurboTax FAQ below for more information:
I already paid for my state and federal, but don't want to file my state yet due to the software hasn't updated. Is there a way to cancel my payment so I can change that?
Please reach out to TurboTax Customer Support via the below link to discuss your options. Use the keywords billing issues so you get to the right person.