Ministry of Revenue Tax Office representatives are available by appointment only. If you need to meet with a ministry representative to discuss your tax issue(s), please call 1 866 ONT-TAXS (1 866 668-8297).
The Tax Offices accept tax returns, payments (no cash please) and other documents for the tax and benefit programs, in the drop boxes provided.
- Hamilton - 119 King Street West
- Kitchener - 305 King Street West
- London - 130 Dufferin Avenue, Suite 400
- Mississauga - 77 City Centre Drive
- North Bay - 447 McKeown Avenue, Suite 102
- Oshawa - 33 King Street West
- Ottawa - 1400 Blair Place, Suite 300
- Sudbury - 199 Larch Street, Suite 102
- Thunder Bay - 130 Syndicate Avenue South
- Toronto - 5 Park Home Avenue, Suite 200
- Whitby - 590 Rossland Road East
- Windsor - 215 Eugenie Street West, Unit 103
Hours of Service
- 8:30 a.m. to 5:00 p.m.
- Services are not available on statutory holidays
Note: The Tax Offices will accept Ontario Corporations Tax (CT) payments and returns for pre harmonized years (tax years ending before January 1, 2009) in the drop boxes provided. The ministry cannot accept any CT payments and returns for harmonized years (tax years ending after December 31, 2008). All payments and returns for harmonized years must be sent to the Canada Revenue Agency (CRA).
Please contact the CRA at 1 800 959-5525 or 1 800 665-0354 for teletypewriter (TTY) to make enquiries relating to Ontario corporate income tax, corporate minimum tax, capital tax, special additional tax on life insurers, personal income tax and Corporations Information Act Annual Return.
