If you are asking about editing home information on Trulia, please note that only listings that have been submitted to us manually can be edited directly on Trulia at this time. For all other listings, only photos and open house information is currently editable on Trulia and all other changes must be made with the listing source.
In your case that source is Century 21 and you should contact them to ensure that they make any necessary updates to their site and also the data feed they send to us. Once they update their data feed, our display should update automatically thereafter to show the new information.
Please let us know if you have any other questions or feedback for us.