| Adjala-Tosorontio, Township of, Municipal Office | New Tecumseth |
| Bradford West Gwillimbury Municipal Office | Bradford West Gwillimbury |
| Canada. Canada Revenue Agency [Simcoe County], Community Volunteer Income Tax Program | Bradford West Gwillimbury |
| Canada. Canada Revenue Agency - Grey Bruce, Brockton, Community Volunteer Income Tax Program | Brockton |
| Canada. Canada Revenue Agency - Grey Bruce, Tobermory, Community Volunteer Income Tax Program | Northern Bruce Peninsula |
| Canada. Canada Revenue Agency [Barrie], Barrie, North Central Ontario Tax Services Office - Barrie | Barrie |
| Canada. Canada Revenue Agency [Simcoe County], Community Volunteer Income Tax Program | Innisfil |
| Canada. Canada Revenue Agency, Toronto Region, Canada Child Benefit | Toronto |
| Canada. Canada Revenue Agency. Toronto North Tax Services Office, GST/HST Credit | North York |
| Essa (Township of). Municipal Office | Essa |
| General Topics and Information - Central East, No Physical Location, Free and Low Cost Community Volunteer Income Tax Clinics Simcoe County | |
| Municipal Property Assessment Corporation, Barrie Assessment Office | Barrie |
| New Tecumseth. Municipal Office | New Tecumseth |
| Ontario. Ministry of Finance., Oshawa, Retail Sales Tax | Oshawa |
| Service Canada, Barrie, Service Canada Centre, Barrie | Barrie |
| Town of Innisfil, Town Hall, Innisfil Municipal Office | Innisfil |