JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Yes, there is an option to add a COUPON code. Please find the screen below:
Also, please find the related guide: https://www.jotform.com/help/233-How-To-Add-Coupon-Code-in-the-Payment-Form
If you need further assistance, do not hesitate to contact us.