I don't understand facebook that well but what does it mean tag required. I saw tag on the left on the page when I clicked on this comp. Do I just click on that.
Yep. Make sure you 'like' the page otherwise you cant tag. Then click Tag This Photo, then click on the photo and a dropdown box will appear and either select your name or type it in. Then your name should appear in the blue writing tagged in this photo section, then click Done Tagging to save it