Property Tax Forms ; 11-13hms. Pdf, Residential Homestead Exemption (includes Over-65 and Disablility Exemptions) ; 25-25b.Which forms will I need to file? For Harris County Appraisal District, most businesses will need to file the general rendition form, 22.15. You may look up your tax bill online at hctax. Net or contact the Tax Office and Appraisal District to update contact information. How do I fill this out? The Real Property Department records documents pertaining to real property or real estate in Harris County. The forms listed below are PDF files. They include graphics, fillable form fields, scripts and functionality that work best with the free Adobe Reader.