What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
If I understood you correctly, you want to edit prices and add coupon code inside of your payment wizard field. Is this the form you are working on http://www.jotform.com/60318413761956?
Inside of you Form Builder open your payment wizard filed and go to product options.
Simply click on the product and change price of that product. When you change price click on Save Product option.
Inside of that form you do not have coupon code. If you want to add coupon code in the payment form, inside of this guide you can find out how to do it:
Hope this will help. Let us know if you need further assistance.