If you want to offer price discounts, you can create coupon codes and assign them to your order forms.
Go to your Form’s Editor. Under the E-commerce section, click on the Coupon field.
Under the Coupon Codes section, click on Discounts & other options to create a new discount code.
You can create as many coupons as you want and you can use multiple codes for the same discount. Let’s see how to do this.
Click the plus sign to add a new coupon. Type in the code that will later be shared with buyers, specify the discount associated to it and mention what this discount represents.
The discount can be percentual or can consist in a fixed amount. In the latter case, the currency will be the one set in the Settings – Products section.
You can use multiple codes for the same coupon.
If you want certain coupon codes not to be assigned to the form anymore, remove them from the Coupon Code list.
If you are using another version, check out this article with the same subject.