Phone: 1 866 ONT-TAXS (1 866 668-8297)
Fax: 1 866 888-3850
TTY: 1 800 263-7776
Write: Ministry of Revenue
33 King Street West
Oshawa, Ontario, Canada
L1H 8H5
If you have questions about Ministry of Revenue programs and services, first read our frequently asked questions — you may find the answer to your question more quickly than via e-mail, phone or mail.
Protect your privacy!
For reasons of security and privacy, we ask you not to send us any sensitive information such as your social insurance number (SIN), client account number(s), case or file numbers.
If your browser does not support forms, please send your e-mail message to: feedback.rev@ontario.ca
The personal information that you have provided to us to enable us to respond to your comments will only be used for that purpose. You will not be placed on any mailing lists, nor will your information be released to any third party, except as may be authorized by law. The authority for obtaining this information from you complies with section 38(2) of the Freedom of Information and Protection of Privacy Act. Questions about the collection of information can be directed to Communications and Corporate Affairs, 3rd floor, Frost Building North, 95 Grosvenor Street, Toronto, Ontario, M7A 1Z1. For more information on protecting your personal information, please visit our privacy statement.
Phone, Fax or Write
Other Contacts
Harmonized Sales Tax
To speak with an information officer about the Ontario Budget or the proposed Harmonized Sales Tax (HST), please call 1 800 337-7222 or 1 800 263-7776 for teletypewriter (TTY). Learn more about the benefits of the proposed HST.
Written Tax Interpretations
We do not use e-mail to reply to requests for tax interpretations. To obtain a written interpretation on a specific situation not addressed in a publication, please send your request in writing to:
Ministry of Revenue
Tax Advisory Services Branch
33 King Street West, 3rd Floor
Oshawa ON L1H 8H5
The Ministry of Revenue is committed to providing fast, effective customer service to all of our clients. In order to provide you with the best service possible, we have entered into a partnership with ServiceOntario.
ServiceOntario centres can be found throughout Ontario, with staff available at each location to provide you with a wide variety of government information and services.
All ServiceOntario centres accept tax returns, payments and other documents in sealed envelopes only and provide general information and publications on Ministry of Revenue tax and benefit programs.
ServiceOntario offers additional walk-in services to Ministry of Revenue clients at 12 locations. These new services include issuing receipts and accepting the following:
- completed paper registration applications
- applications for refunds
- payments and other documents in sealed and unsealed envelopes, and
- cash payments.
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.
