Removing tax from the bill

To remove tax from a bill, after adding items to the bill screen, touch the Tax switch at the bottom of the bill.
If the Require notes for system functions setting is ON in the Settings tab, turning Tax off on the bill will bring up a pop-up dialogue box where a Note is required to explain the reason for turning Tax off.
If the Require notes for system functions setting is OFF in the Settings tab, you can simply turn tax on and off using the switch at the bottom of the bill.