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 edit submission through your form's Submission View, please check this guide: https://www.jotform.com/help/325-How-to-Edit-Submissions-Made-on-Your-Forms
You can also edit submissions from your email notifications by using the edit link, basically you do the same as explained on this guide: https://www.jotform.com/help/40-How-to-Let-Users-Update-Their-Form-Submissions-at-a-Later-Date, but you include the edit link in your email notification.
Let us know if you need more help, we will be glad to assist you.