First, let me ask WHY? Keep in mind that Trulia is NOT a real estate company, an auction company or even a property management company. Trulia (and Zillow and Realtor.com) are just marketing sites that offer info about buying, selling, and renting. The listings you see come from various sources, such as local MLSs (multiple listing services), public records, and individual properties for rent. The listings can be very outdated and have inaccurate info. If you're not buying or selling then you really should care what this site says about your house. If you insist on getting this info changed, then you need to correct it at the source -- your county records department. But then guess what? You could be opening up a can of worms. You can have the county correct the info, but then they'll likely raise your taxes! And if you had work done that wasn't permitted, then you could face fines. Regarding your home's "value" this site means NOTHING. The values are terribly inaccurate. The only way to get an accurate picture of your home's TRUE "Fair Market Value" is to have a Realtor do a market analysis.
I just wrote a blog post on the subject: