JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
Here is the jotform user guide on https://www.jotform.com/help/227-How-to-Enable-Auto-Fill-Feature
this feature will allow the form respondent to come back to the form at a later time to continue working on the form.
Please take note that this feature will only work if the user uses the same browser on the same computer later on.
There is an old method that can work even if done on different browser and computer. But it will require 2 forms.
Cheeck the user guide here https://www.jotform.com/help/97-How-to-Save-Forms-to-Continue-Later