You must complete your profile page in order for it to be 100% complete.
To do this: click on your name in the upper right corner of the screen. A drop down menu will appear which includes a tab that says "profile". A new window will appear that has a tab for editing your Trulia profile.
If you have filled out all the information and it still says that you are not 100% then you need to contact Trulia to have them fix it. Click on the "help" tab from the drop down menu under your name. Then on the "contact us" tab next to your name. Here you can send Trulia an e-mail requesting them to update your profile page for 100% completeness. They usually respond within 24 hours.
Hope that helps.
Prudential Connecticut Realty