Under the main photo section, there is a banner of:
Home Details | Neighborhood Info | Affordability | Price History & Trends | More
Click on "More" and select "Flag." State you're the homeowner and make the corrections.
If you're house is currently on the market with an agent, he or she should be double checking Trulia's data. If you're house isn't on the market and you just want to update the info, this might be providing more information than what's in your best interest when considering tax assessments (read the article below ).