What jernest said. It's under 'edit profile'. If you answer the ?'s there some of them show up in your posts. Like- Location-fav game-fave site.
Your ? about taxes is a little bit harder to ansewer. First, no matter what if you win at poker-even a $1 you must report it on your income taxes.
How you report it depends if your a 'pro' or not. Best to let a accountant handle it until you learn how to do your own taxes with poker winning on it.
Here's a few links to look over:
You might what to use the search function upper right of this page as there have been several threads about taxes and poker.
Good luck on the felts.