| Business | Phone |
| American Tax Svc 1501 N 5th St, Duncan 73533 | (580) 252-0777 |
| C & W Tax Svc 701 W Main St # 12, Duncan 73533 | (580) 252-7008 |
| Duncan Loan 209 S Highway 81, Duncan 73533 | (580) 252-6044 |
| H & R Block Tax Svc 1219 N Highway 81, Duncan 73533 | (580) 255-8269 |
| Jackson Hewitt Tax Svc 1845 N Highway 81, Duncan 73533 | (580) 255-1051 |
| Larry D Smith Inc 1012 W Oak Ave, Duncan 73533 | (580) 252-1114 |
| Sun Loan Co 1896 N Highway 81, Duncan 73533 | (580) 470-9054 |
| Stan's Tax & Accounting 833 W Main St # B, Duncan 73533 | (580) 252-5343 |
| Sooner Tax Svc 1503 W Bois D Arc Ave, Duncan 73533 | (580) 255-4763 |