Key question: Is your property listed FOR SALE? Or are you just looking at the public record info?? If the home is listed for sale, your REALTOR needs to make sure the data entered into the MLS is accurate. Trulia pulls it's For Sale listings from various MLSs, so the data is only as good as what the agent entered.
But I hear about many people looking up their property here to see the home's value, and they find mistakes in the data. This is a public records issue. And you could be opening up a can of worms. Sometime people make improvements to their property and it's not permitted. i.e. did you add a parking space? or was it always 3 car parking? If the info is just inaccurate, then by all means, contact your county assessor and ask them to make the corrections. They might have to send someone out there to inspect & measure the property. But guess what....this may INCREASE YOUR TAXES TOO!!!
So, this goes back to my original question. If the house is for sale, then yes, it should have accurate info. But if you're just being knit picky...then I would try and decide if it's worth it.