Updating applicant/member information on a form

Hi - I’m trying to help a non-profit organization that accepts membership applications via an AirTable form. As the organization is for military spouses, members routinely need to update information submitted with their membership application. Is there a way a person can update their record with such changes? As it is now, the member updates the form and a new ‘contact’ is populated rather than having the existing information updated.

Thanks!