| Business | Phone |
| H & R Block Tax Svc 164 Old Country Rd, Riverhead 11901 | (631) 727-0175 |
| H & R Enterprises Corp 222 Main Rd, Riverhead 11901 | (631) 369-7900 |
| Jackson Hewitt Tax Svc 78 W Main St, Riverhead 11901 | (631) 369-0006 |
| Sky Tax Svc 47 E Main St, Riverhead 11901 | (631) 727-0193 |