To apply Coupons to POS bill on Web Application, Follow the below mentioned Steps:
Step 1: Click on Sales in the Taskbar and Select POS Billing.
Step 2: Add the Product >> Add Quantity >> then Click on Add Item.
Example: We have Added Chocolate as a Product.
Step 3: Click on Checkout
Step 4: Click on Use Coupon and then Click on Apply.
Refer to the Article if Coupon is not Created.
Step 5: Coupon Discount Will be applied to the bill.