Module will add two new buttons in the POS Screen 1) Tax Free 2) Apply Tax. Its visible alternatively based on the button press by user.
If user click on Tax Free button, Apply Tax button visible, Tax Free button invisible. Taxes set on the selected order is removed and also tax is not set if user add new products on that order.
If user click on Apply Tax button, Tax Free button visible, Apply Tax button invisible. Taxes applied back on the selected order as it is.
As you can see in below image, Taxes are already applied in Order. User need to Click on Tax Free button to clear taxes applied in this order.
After clicking on Tax Free button, Taxes are removed from order as per below screenshot. Now user can see button Apply Tax, by clicking on that button Taxes apply back to order as normal.