The Facebook tagging feature allows you to tag people you are friends with, places you are associated with, pages you like and events you are invited to or attending in your Facebook status updates by placing the "@" symbol before the name of the person, place or thing you want to tag. Then, when you begin typing the name of the person, place or thing you want to tag, Facebook generates a list of possible tags, allowing you to tag an event you are invited to or attending on Facebook in a few simple steps.
Open the computer's Web browser, and navigate to the Facebook log-in page. Type your Facebook account email and password in the spaces provided, and click the "Login" button.
Click the "What's On Your Mind?" status-update box to place the mouse cursor there. Insert the "@" symbol into the box and begin typing the name of the event you want to tag. Facebook will automatically generate a list of the events that match the letters you enter into the status-update box.
Select the event from the list of results to tag it in the status-update box. Click the "Share" button to post the update that contains the tag to Facebook.