H & R Block 1510 Denmark Rd Union, MO 63084 Phone : (636) 583-3172 Business Category Schools Schools-Business & Vocational Tax Return Preparation & Filing Schools-Business & Secretarial H & R Block Tax Service 3 S Oak St Union, MO 63084 Phone : (636) 583-3172 Business Category Schools Schools-Business & Vocational Tax Return Preparation & Filing Schools-Business & Secretarial