Delete the users associated with the form by navigating to the Product the School Form is contained in such as Academics, Enrollment Management etc.
  1. Content > Select School Forms
  2. Select Delete on the preferred School Form 
  3. If the form has been submitted you will get a prompt warning you that all associated data will be deleted. You will need to confirm that you are okay with these changes prior to deleting the form.
  4. Select Confirm