BB codes ingame are found at the top of the box where you'd type in your message. Like if you go to post in your internal forum and hit "reply" you'll get a box in which you can type in your post and at the top of this box there are a bunch of symbols like Bold, Italics, Underlined, and various other text related ones. Then you have the BB codes which are Player, Alliance, Town, etc. These are also found at the top of the box and they each have their own symbol and when you hover over the symbol it will tell you which BB code it is.