To Add Discount Coupons, go to Ecommerce section which is located on left side of the screen. From the drop down menu click on Discount Coupon and head to the Add Discount page.
There are two types of discounts coupons. One is an ‘X’ percentage of discounts and the other is of a flat rate.
Fill in all the details of the Discount Coupon and click on Save & Close.
Below is the screenshot for your help: