| Business | Phone |
| A Plus Bookkeeping & Tax Svc 179 King St E, Oshawa L1H 1C2 | (905) 728-8585 |
| All-Tax Svc Inc 5 Bond St W, Oshawa L1G 1A1 | (905) 723-3113 |
| H & R Block Canada Inc 40 King St W, Oshawa L1H 1A4 | (905) 436-9882 |
| H & R Block Canada Inc 555 Simcoe St S, Oshawa L1H 8K8 | (905) 436-7188 |
| H & R Block Canada Inc 15 Bond St E, Oshawa L1G 1A8 | (905) 723-2217 |
| H & R Block Canada Inc 419 King St W, Oshawa L1J 2K6 | (905) 438-9489 |
| Liberty Tax Svc 528 Simcoe St S, Oshawa L1H 4J8 | (905) 571-7486 |
| Liberty Tax Svc 40 King St E, Oshawa L1H 1B3 | (905) 438-8815 |
| N L Woodhouse & Assoc 74 Simcoe St S #201, Oshawa L1H 4G6 | (905) 432-7733 |
| P & L Tax Svc 155 Simcoe St S, Oshawa L1H 4G8 | (905) 571-5526 |
| Spurrell, Mark 378 King St W, Oshawa L1J 2J9 | (905) 571-4180 |
| Figtree Financial Svc 343 Ritson Rd N, Oshawa L1G 5P9 | (905) 432-2304 |
| Transport Financial Svc 402 Blackthorn St, Oshawa L1K 1K9 | (905) 432-8070 |
| Trax Accounting & Bookkeeping 325 Baldwin St, Oshawa L1H 6H5 | (905) 404-8546 |
| Bonnie's Bookkeeping Svc 721 Bloor St W #200, Oshawa L1J 5Y6 | (905) 723-3401 |
| Dam Income Tax 1300 King St E #26, Oshawa L1H 8J4 | (905) 725-0268 |
| Gallery Tax & Accounting Svc 156 Taunton Rd W, Oshawa L1G 3T3 | (905) 579-6728 |