You can close the form to stop accepting responses. Login to Neartail. Click on the form to open it. Edit page will be displayed. In the Neartail Edit page, click on the gear icon next to the form title. Form settings will be displayed. Click Advanced. Check Close this form option, add a custom message and click Save. When you close your form in Neartail, users will not be able to view the form or submit their response, but you can edit the form and manage responses. Please try this and confirm.