After you have finished adding the promotion coupon code into the Dealpos system, The next step is how to use the coupon when making a sales transaction on the sell menu. The steps are as follows:
Step 1. Go to the Sell menu and input the product you want to sell

Step 2. Click Coupon Icon and input coupon code then click Ok

** Note is optional
Step 3. Discount will be applied automatically and there will be a pop up to indicate that the Coupon is applied. click Pay to process payment

Step 4. Sell using Promotion Coupon code is success

You might also like to read these articles below:
To make a promotion coupon for discount percentage, you can check this article Coupon for Discount Percentage
To make promotion coupon discount Amount or gift voucher, you can check this article Discount Amount / Gift Voucher
To make a promotion coupon return, you can check this article Coupon Return - Authorization to enable sales return
To make a promotion promotion coupon parked deletion, you can check this article Promotion Coupon Parked Deletion - Authorization code to enable DELETE parked order