Guide
How to Limit Responses in Google Forms
Follow these steps to limit responses in Google Forms, restricting users to one submission per person.
Open your Google Form.
Click on the "Settings" tab.
Scroll to "Responses" and toggle on "Limit to 1 response" (requires sign-in).
To close responses after a certain number, use FormLimiter add-on.
Click the three dots in the "Responses" tab and select "Accepting responses" to manually stop new entries.