Entering a coupon codes could cause a reduction in price for items that are in the patrons order. An analogy is the supermarket. After scanning all groceries, you provide the coupons to the cashier and prices are adjusted retroactively according to rules.

You only need to enter:

• the coupon code (you can look one up)
• the number of coupons of the same type to apply and TM will adjust the price
• repeat for as many coupon codes as you wish

Coupon codes are described in detail in coupon setup. Please refer that section to see how payments are applied.