You might want to enable Coupon code as a payment method for online orders. This feature can be activated by following the steps below:
1. Sign into SalesVu.com
2. Select "Web Store" on the left sidebar menu, and select "Payment" on the following screen
3. Toggle the "Discount Code" (make it "On")
4. Click on "Save" in the bottom right corner
Go to the following link to create a coupon code: Discount: Coupon Code