You can review your Form 1040 and Schedules 1-3 prior to paying to see how TurboTax is handling the income tax and SE tax. Or you can pay in advance and have access to view/print all forms.
See this
FAQ: How to I preview my TurboTax Online return before filing?
https://ttlc.intuit.com/community/accessing/help/how-do-i-preview-my-turbotax-online-return-before-f...
