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.
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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.
It is possible to add an options or properties to the product. In the Products screen in the payment wizard, select the product and then click the "Add New Option" button. In the pop up, select " " and then press the "Next" button.
After that, if you want to customize the text or enable special pricing, you may do so. For this example, I'll leave it as a default and finish the integration.
Here's the result:
Please refer to this guide: https://www.jotform.com/help/225-How-to-Add-Options-to-Payment-Forms
Hope that helps. Thank you.