Assuming you got licensed now, Congratulations and welcome to the Real Estate World. If you click on My Trulia tab and then go to your profie. You will see the edit your personal preferences. There is a drop box that starts with "I'm a ", go and click on Real Estate Pro. Then the next drop box is what type of pro. Click on agent.
Hope that helps. Meanwhile feel free to visit my website at http://www.TJSellsHomes.com