got to "My TER" - "More" - "My Board posts" and you'll see a list of all your posts. If one was removed, there will be a notation - if you want to know why it was removed, send a message to admin, give as much info as you can so they can find it (which board, time and date of post, title of post, etc).

You won't get much detail, but they'll at least tell you why they feel the post was inappropriate.