Texas property line disputes

[John Ho]

I bought a house with extra land on the hud statement. Hud statement has 3 different lots sold to myself. I was doing some research on Hcad and one of the lots is being taxed to the previous owner who sold me that house with extra land. This piece of land is a corner lot and it clearly shows on the survey being a part of land included in the sale. So Harris county is still sending a separate tax bill to the previous owner and I wanted to know if I have to pay a lawyer to get this straightened out or is it something I can do by calling the title company and HCAD.