When constructing a form, the author has the option to either permit edits to responses after submission or make submissions immutable. By default, response editing is enabled for new forms, but this setting can be easily modified as follows:
Open the form builder screen for the form you want to restrict users from editing submissions for.
Click the “…” icon in the top right corner and select “Permissions” from the options.
In the permissions dialogue, toggle off “Allow submissions to be edited.”
