Ontario Ministry of Finance: GST/HST Contact Information for Toronto

For GST/HST inquiries in the Toronto area, contact the Ontario Ministry of Finance through the following channels:

Phone

Toll-free: 1-877-469-7427
Hours: 9:00 AM – 3:30 PM ET, Monday–Friday
Language: English only

Email

Address: GSTHSTQuestions-QuestionsTPS/TVH@ontario.ca

Important Notes

• This line handles provincial GST/HST matters for Ontario businesses and residents.
• For federal GST/HST questions (Canada Revenue Agency), call 1-800-959-5525.
• Have your Business Number (BN) or Social Insurance Number (SIN) ready when calling.
• Wait times can be lengthy during peak filing periods (March–April, July–August).

Online Resources

Visit ontario.ca/ministry-finance for forms, guides, and self-service options.