Sorry--they do not do it that way. If your federal refund will not be enough to cover both your TurboTax fees and the refund processing fee, then you have to pay TurboTax upfront using a credit/debit card. They do not take partial payments and bill you for the rest.
https://ttlc.intuit.com/questions/1901301-what-forms-of-payment-does-turbotax-online-accept
If you will be getting a federal refund there is no penalty for filing after the deadline, so if you need to wait to pay TurboTax and e-file later--you can still e-file a 2019 return until October 15, 2020.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
