Solution: Turbotax 2020 Canada went into endless loops and would not launch until I shut off my internet security, including my VPN.

CANADA  This is the U.S. TurboTax public user forum. For help with Canadian taxes, please post your question in the Canada TurboTax user forum., at the following link.

https://turbotax.community.intuit.ca/community/turbotax-support/help/03/en-cahttps://turbotax.intuit.ca/tax-software/index.jsp