T3 Trust Returns
The requirement to file a T3 Trust Return is new for many people. I will put more information here later. For now, please start with the CRA site "Who should file a T3 return" here:
https://www.canada.ca/en/revenue-agency/services/tax/trust-administrators/t3-return/who-should-file-a-t3-return.html
https://www.canada.ca/en/revenue-agency/services/tax/trust-administrators/t3-return/who-should-file-a-t3-return.html