Hi there, @91sspic.
I appreciate you following the recommendation given by my colleague, and providing feedback about your call experience. I can share some information about sales tax calculation in QuickBooks Online.
The calculation of sales tax on your GoPayment transactions is base on how it was set up in your QuickBooks. You have options to manage your collecting, reporting, and paying of sales tax.
For your guide, you can check out these articles:
At this time, I'll do my part and raise your feedback to the right people and have this taken care of. I recommend you do that same. You can click the Gear icon and choose Feedback.
Keep me posted on how it goes or if you need anything else from me. I'm here to help you more. Have a good one.