How do I file just the Federal without the State?

[NicolleR1]

Just don't complete the file portion for the state. When the program asks you to finish your state return, either select “skip state” or just don't continue with the state section. Then select e-file for the federal return only.

[VolvoGirl]

You can file Federal now and skip state or do state later
https://ttlc.intuit.com/community/state-taxes/help/can-i-file-my-federal-taxes-now-and-skip-my-state...

To not pay for state now you can delete it. You can add it back again later if you want.
Delete state return
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-delete-my-state-return-in-turbotax-on...