I want customers able to update there information

In membership form once the member add there data, I want them to be able to go back to the form and upload there data and edit it.

Thanks

To allow users to return to their submission at a later date to update their data, include an edit submission link in the autoresponder email.  Here is how to do so:

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