To report a lead on suspected tax or benefit cheating in Canada, please visit https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/suspected-tax-cheating-in-canada-overview.html.

This oversight and investigation falls under the responsibilities of the Canada Revenue Agency.  Due to privacy and the integrity of any investigation, you will need to report your information directly to them as outlined at the webpage above.  You will remain anonymous in the process and will not be required to disclose personal information about yourself unless you choose to do so.