This is all hogwash. There is simply nothing preventing TurboTax 2019 - both the US and Canada editions, from working on Windows 7.
It is an artificial limitation that Intuit seemed to have purposely introduced.
For the US 2019 version, at least they show you a warning dialog about Win7 becoming End-Of-Life BUT still allowing the user to proceed with the installation on win7.
For the Canadian 2019 version however, they took out that warning dialog, and the installer, by default, is blatantly preventing you from doing an install on a win7.
For how many times are the Canadians screwed over by Intuit!??
I have found a solution to install the TurboTax Canada 2019 edition on a win7. Can show you how it can be done. Just message me.