Can you edit a submission?

Yes. It is possible to edit a submission that you have received from submissions view. While you are in the submissions view page, please scroll down the page to view the list of submissions.

Now, click on the submission that you want to edit which should be displayed on the page.

Click on Edit icon on the right-hand side top corner of the submission view to edit the selected submission.

Once you click on Edit, the JotForm with prefilled entries shall be displayed. Make necessary changes as required and Submit the form as you fill the form normally.

Once the form is submitted, the notifiers (email alerts) shall be sent with EDIT in the subject line.

If you want the users to update their submission, please refer to the following guide

http://www.jotform.com/help/40-How-to-Let-Users-Update-Their-Form-Submissions-at-a-Later-Date 

Hope this information helps. Please get back to us if you need further assistance. We will be happy to help.