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.
You can update an already submitted entry through it's edit link, which can be included in an email notification: http://www.jotform.com/help/25-Setting-Up-Email-Notifications
Or you can do it directly through submissions view: https://www.jotform.com/help/269-How-to-view-Submissions
If you want to be able to continue with a form later before submitting, you can apply the following workaround: https://www.jotform.com/help/97-How-to-Save-Forms-and-Continue-Later
If you need anything else, please open a new thread, we will be glad to assist you.