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.
You can achieve by redirect the JotForm back to itself by entering its URL in the URL box of Custom URL section of the Thank You Page Wizard:
Just to clarify, if your JotForm's URL is http://form.jotform.com/form/0123456789, you would enter that as the URL inside of Thank You page redirect URL.
Hope this will help.