[bee_rider]

On top of this, I don’t see how a contract that you are compelled to agree to in order to do your taxes could be seen as one that you’ve willingly entered.

[stewx]

Using the My Account web site is not required to do your taxes. You can file by mail AND electronically with Netfile without using it at all. Src: https://www.canada.ca/en/revenue-agency/services/e-services/...

That being said, My Account is a useful, albeit very flawed online tool.