@QST Thank you for joining community.
To add sales tax to sales receipts in the GoPayments app, follow these instructions:
- Open GoPayments app and tap the Menu icon in the upper left hand side.
- From the menu tap Settings.
- Under payment settings, tap Sales Tax.
- Switch sales tax On.
- Tap Tax Rate.
- Enter tax rate and tap OK.
This will allow sales tax to be added to your transactions.
Let us know if you need additional help!