Close and schedule forms
Open and close your form manually, on a schedule, or after a number of responses, and choose what people see when it's closed.
All of these settings are under Settings → General.
Accepting responses
Turn off Accepting responses to close the form immediately. Turn it back on to reopen it.
Response schedule
Use Response schedule to open or close the form automatically at specific times, for example an application window from 1 to 31 March. Times are in your local timezone.