The 2 recommended ways to edit form submissions are as follows:
Through Form Results (Admins/Managers)
Go to Form Results
Use the drop-down menu next to "View Result" then select "Edit Result"
Make the necessary changes then select Submit
Through Stores/Accounts (Reps)
Go to Stores and find the Store where the form was submitted
Select "Edit"
Choose “Form Submissions” from the menu at the top of your screen to bring up recent form submissions.
Use the drop-down menu next to "View Result" then select "Edit Result"
Make the necessary changes then select Submit