You can edit your response form at any time as it is web based, even if you have already sent your invitation.
To do this, find your invitation form on the Invitations overview screen. Once you have clicked on it, you will see a 'Form' tab at the very bottom of your browser page. If you are having trouble finding the 'Form' tab refer to this article for help.
Watch our tutorial video for a quick overview:
To manually close the form, go to 'Form Settings' and toggle the 'Form Is Taking Responses' switch from On to Off:
You can further define a 'Form Closed Message' which will be displayed to your guests on the browser once the form is closed and no longer taking any RSVPs:
It is possible to edit other components of the response form from the 'Edit Form' screen as well. Any changes made will go live for the guests viewing the form from that point onwards. Find out more in this article here!