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.
Do you mean to replace the Submit form button by a Paypal payment button? If that is correct, let me inform you that it is not possible.
You need to use our Paypal integration to let your users pay the products they select.
That way once they select the product they wish and click on Submit button they will be redirected to the Paypal payment page so that they can complete the payment process.
Please inform us if I have misunderstood your query.