When you sell your principal residence, usually you do not have to pay tax on any gain from the sale. This is the case if you are eligible for the full income tax exemption (principal residence exemption) because the property was your principal residence for every year you owned it.
Starting with the 2016 tax year, generally due by late April 2017, you will be required to report the sale on Schedule 3, Capital Gains of the T1 Income Tax and Benefit Return. Reporting will be required for sales that occur on or after January 1, 2016.