how i can add coupon code in my payment forms?

Hello theworldtech,

You can add coupon codes through the payment wizard of your payment question. The following guide should help you add coupon codes:  http://www.jotform.com/help/233-How-To-Add-Coupon-Code-in-the-Payment-Form

Hope this helps.

Do get back to us if you have any questions.

Thank you!