You can easily add the Online Scheduler or Contact Form widget to your Facebook company page.
- Navigate to Online Presence>Facebook Add-On
- Select the widget type you wish to add and click on Add to my page.
- Connect to your Facebook account and select the page it should be added to.
Please note that the Facebook Add-On can only be added to a company or fan pages.
To manage the tabs on your Facebook page, please see this article.