Hi Turner~
Greetings from TEXAS!
You can access the Harris County Appraisal website at:
Harris County Appraisal District
Or more specifically-to search by address:
HCAD Real Property Records
This will allow you to determine to whom the land is registered to. Then compare what you find at the Appraisal district with the Tax Record.
For the Harris County Tax Office-
Harris County Tax Office - Search Current Tax
This should be of great help in fixing your situation. Also, if you are needing to clear title, you might have a case of Adverse Possession. In which case, if so, you could file lawsuit to "Quiet the title". This would clear your property title of the situation which appears to surround it. :-)
I work with low and fixed income community members and understand how difficult it is to achieve on a limited budget. The process can be done without a lawyer but proves difficult for the uneducated. You should also check with the county clerk to see if there is a Legal Aide Service... Google: Lonestar Legal Aide. Harris County may be included in the multi-county region. Their services are provided by the state via pro bono, and will provide you a lawyer for your situation, should you find you still need one.