If you are a resident of Ottwha and your questions relate to your tax return, here is the address. Shawingan TC is located in Quebec.
Office address:
4695 12e Avenue
Shawinigan-Sud QC G9P 5H9
Mailing address:
Post Office Box 3000, Station Bureau-chef
Shawinigan QC G9N 7S6
Fax number: 819-536-7078
If you are living in Toronto, you should find the address for Surbury TC
Hope it helps