How to disable payment process if the "Groupon" is selected in form?

I have a reg form that customers can choose classes for payment is already set up however I have customers who purchase a class through Groupon which is already paid for. So how do I override the payments when groupon is checked?

You can add condition in your form to check if the "Groupon" is selected as "Yes" and then hide the payment tool of form. 

Please take a look at the following cloned form where I have added the condition and see if that works as expected:  https://form.jotform.com/82611231985962

Hope this helps.

Do get back to us if you have any questions.