How can I add discounts to a form?

Thank you for contacting us. Please try the following:

1) Add a Short Text Entry field to ask for the coupon code.

2) Add a Form Calculation widget where you will get the discount total.

3) Add another Form Calculation widget where you will calculate the Total Event Price - Discount amount.

Example:

4) Finally, create a condition to output the total into the Discount Amount field based on the Coupon Code entered: https://www.jotform.com/help/268-How-to-Insert-Text-or-Calculation-into-a-Field-Using-Conditional-Logic

Result: https://form.jotform.com/200266929003955

Let us know if you need more help.