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 the Submission via the Edit link that you can add on the Email notification you will receive when your form is submitted.
Then, on this window:
So when someone submits your form, you will receive an Email notification with this link:
You can then update the values in the form fields and submit the form again.
Remember that the submissions stored in your submission page will also be updated after submitting the edited form. So if you want to keep the old submissions before it is edited, you can save those submissions first by downloading a PDF, CSV or Excel copy of it.
You may also check this guide for reference: How-to-Let-Users-Update-Their-Form-Submissions-at-a-Later-Date
I hope this helps. Let us know if you need further assistance. Thank you.