You can pay early to lock in the current price.
How to pay the fees
https://ttlc.intuit.com/community/payments/help/how-can-i-pay-for-my-turbotax-online-fees/00/27388
Or you can say you want to print and it will make you pay first.
- If you're not already in your return, sign in at TurboTax.com and then select Take me to my return.
- Select Tax Tools and then Print Center from the left-side menu (on mobile devices, tap in the upper left corner to expand the menu).
- Select the first option, Print, save, or preview this year's return and follow any additional onscreen instructions.
