In your case the answer is straightforward, you would mark the T1-General as a Terminal (Final) Return in the blank space in the Top Right Corner of the T1-General, Page 1. and supply the Date of Death, along with supporting proof (a copy of the Certificate of Death is sufficient, and which does NOT need to be a Certified True Copy sworn before a Notary).
In the case of a tax preparation using either Profile or TurboTax, there is a Blank Space on the Top Right hand corner of the T1-General, Page 1, which is intended to route various other filings properly: Pre- & Post-Bankruptcy, which are usually done through a Trustee, and Partial Returns, Short Returns, Non-Resident Returns and Terminal Returns which are the purview of CA's, CFTA's, CGA's, CMA's and Tax Preparers. This advises the Canada Revenue Agency ("CRA") which section ("§.00.00") if the Income Tax Act is being applied to the return being filed, ensuring that the return is routed to the relevent department.
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