Hi..I think you can go into it and claim the listing. However, the sale price is probably the old one. If you used a realtor to purchase they may be able to go in and add it as a listing they sold under their account and it may change. Don't worry about it though. There are enough places buyers know to look to find out what it last sold for. Usually if the home you bought was on MLS it feeds through to Trulia once it has sold but sometimes it may not as with other computer gliches.