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.
I believe that can be achieved by using two forms. The first form will collect the deposit, and the user will receive a link to the second form. When they open the second form using the link, they will be able to see the remaining balance that they will need to pay with the help of sessions. You can check out this thread that will walk you through setting it all up: Is there a way to accept a deposit payment, and then pay a balance due at a later date?
Alternatively you can also setup a recurring payment that will initially charge the user for the deposit, then it will charge them again at a set time depending on the subscription period you have set. Please follow this guide to set it up: How to setup a recurring payment option
If you need further assistance, please let us know.