Coupon Code Error

I am trying to change existing coupon codes as well as add new ones and it isn't allowing me to do that. Please advise.

I have inspected your form and I noticed that you have fields inside of your form for collecting credit card information and that is against JotForm terms of use. Card number, expiration date, security codes and card holder name are considered critical information and cannot be collected on plain text fields. The only services allowed to collect such data are those that are DSS/PCI certified.

I have removed those field form your form. 

If you want to have payment fields inside of your form you have to use one of JotForm payment tools. 

Inside of this articles you can find out more about payment tools and how to set payment form:

http://www.jotform.com/help/47-Order-Form-Basics 

http://apps.jotform.com/category/payment_processing 

http://www.jotform.com/help/165-Setting-Up-Your-First-Order-Form  

Regarding your Coupon Code question inside of your payment field you have option to change existing coupon code and add new one.

Also this article can help you to add coupon code inside of your payment form:

http://www.jotform.com/help/233-How-To-Add-Coupon-Code-in-the-Payment-Form 

Hope this will help. Let us know if you need further assistance.