Qualifying for 100% homestead exemption in Texas,house decreed to me,ex-spouse still appears as joint tenant.?

I posed this ? to the Tax Office who refuses a homestead exemption I've had since 1983.They referred me to the Appraisal District office for ownership changes and courthouse for Deed/Title filing.both summarilly ignored my ?. Attorneys' receieve hundreds for title search and transfer. Is this neccessary to ensure the appraisal district office gives my name only to the taxing/exmption entity as owner.