When do I need to pay TurboTax?

I have finished inputing my data into TurboTax.  I have decided to pay extra to have it reviewed by one of your tax experts.  I have an appointment to discuss this with him or her next week because I want to make 100% that I have done it correctly.

 

Question: Do I have to pay the $90 TurboTax fee before or after my appointment with your tax expert?  BTW...I prefer to pay before so I can avoid the price increase on the 28th.