JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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You can add the Edit Link found in Form Fields on the Right-panel when cmposing the Notification E-mail.
The Notifer (email message) you will receive (from form submission) will then contain an Edit Link to directly edit/change the associated submission data.
Let us know if we can be of further assistance.
Thanks you, Michael