Yes, you can include the cost to cancel the mortgage as part of the "Outlays and Expenses".
As for the CMHC mortgage loan insurance, we would recommend contacting the Canada Revenue Agency (CRA) and consulting with them on how you should put that on your return. If you are in Canada, you can call them at 1-800-959-8281. This CRA page has info on other ways to contact them: https://www.canada.ca/en/revenue-agency/corporate/contact-information.html
