Which forms will I need to file? For Harris County Appraisal District, most businesses will need to file the general rendition form, 22.15.Most likely, the bill that you received is for your business personal property and not for the real estate itself. Private property refers to things that belong to people or businesses, not the government. This type of business personal property is meant to be taxable at the very same tax rate as any real property in Texas. Private property is the stuff you own for the purpose of charging others to use it. A HarrisWalz administration would introduce a "firstever tax incentive" for homebuilders who sell starter homes to firsttime homebuyers. Businesses operating in Harris County must file a rendition with the Harris County Appraisal District (HCAD). Apply for a Texas sales tax permit with the Texas Comptroller (800-531-5441 x3-0925).