When all the forms in your return are ready to efile you will have the option to pay the TT fees from the federal refund.  Click on the REVIEW tab to see what you are waiting on.  

You can view your Form 1040 and Schedules 1, 2, and 3 before you pay the TurboTax fees. But to see any other forms you have to first pay the TurboTax fees.

Paying the fees does not file your tax return. Even after you pay, you still have the opportunity to review your entire tax return, and make sure everything is correct, before you actually file it.

See the following FAQ for instructions to view your return in TurboTax Online. It has instructions to see your entire tax return, or just Form 1040 and Schedules 1, 2, and 3. "Preview my 1040" will also show you Schedules 1, 2, and 3.

How do I preview my TurboTax Online return before filing?