Pay Your Property Taxes Pay Your Motor Vehicle Registration General Information: Phone Number: (254) 582-4000 Fax Number: (254) 582-4001 Address: 80 Waco Street Hillsboro, TX 76645 Mailing Address: P. O. Box 412 Hillsboro, TX 76645 Email: tacmail@co.hill.tx.us Hours: M-F, 8:00 AM- 5:00 PM