How can the users edit forms after they have submitted?

I have created the field for the users to be sent an email after submission so they can edit the form, but it doesn't seem to be working.

Not sure how to rectify this?

If you have implemented this solution: https://www.jotform.com/help/40-How-to-Let-Users-Update-Their-Form-Submissions-at-a-Later-Date, and the autoresponder is not being sent, please let us know what is the form in question, and we will test it.