Tap the Menu icon on the top-left corner to go the Settings section.
Tap the Tax row.
You will be prompted with the screen pictured above. Enter or edit the Tax %, and tap Save.
Tap the ON/OFF toggle to enable/disable tax for all transactions. If Tax is ON, the configured Tax % will be the default tax that will be applied to all your transactions. However, while running a transaction, you also have the ability to edit the Tax % for that specific transaction.
For additional support, please refer to the Support Page in your merchant portal or contact your ISO contact.