Contact us
Our unique expertise in school tax allows us to support you at every step. Whether you have a question, need to report an issue, or require documents, our team is ready to assist you quickly and efficiently.
Customer Service
Our team is available to answer your questions and provide assistance from Monday to Friday, 8:00 a.m. to 4:00 p.m.
Submit a request or report a change
Would you like to receive a school tax statement of account, report a change of mailing address, or authorize someone else to act on your behalf? Please refer to the available forms.
Head office
Comité de gestion de la taxe scolaire de l’île de Montréal (CGTSIM)
500, boulevard Crémazie Est, Montréal (Québec) H2P 1E7
* Please note that our office is closed to the public.
Media inquiries
All media requests should be sent to communications@cgtsim.qc.ca.
Help us serve you better
If you have contacted one of our services but your issue has not been resolved to your satisfaction, please reach out by filling out the Message Customer Service form. Be sure to provide all relevant information, including your name, account number, a clear description of the issue, and any steps you have already taken.
We are committed to reviewing your case carefully and responding as soon as possible.