How to allow respondents to edit a previously entered form? Is that possible?

Hello!

How do i set up the form to allow respondents to edit previously entered form? Is that possible? 

Yes it is possible to achieve your requirement by adding {edit_link} tag in your form's auto-responder email alert. When the form is submitted, user will receive an auto-responder email which will include a clickable link. Clicking on the link will allow users to edit their own submission. 

You may like to take a look at the following guide which should help you:   https://www.jotform.com/help/40-How-to-Let-Users-Update-Their-Form-Submissions-at-a-Later-Date 

Hope this helps.

Do get back to us if you have any questions.