This guide contains step-by-step instructions on using the Webform content type used for attaching a form to a basic page.
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Create a Basic Page with a Web Form
Navigate to Content > Add Content > Webform
Fill out the relevant fields
The Webform dropdown fields are the options for which form you would like to add to the page. Select the one for your needs.
The Webform Settings section allow you to open, close, or pick a schedule for the form. Schedule allows you to choose an open and close window.