I finally figured what was causing the problem - Trusteer End-point Protection, which I use for accessing bank accounts. There are two ways to access My Account...
I just tried it again and, for some unknown reason, it worked! I didn't do anything differently. In any event, thank you very much for your quick responses.
I have tried that idea and got the same result, i.e., TurboTax not able to download the info because it detects an error when trying to connect to CRA.
By the way, my browser is MS Edge. I have tried clearing browser history and re-installing TurboTax to no avail. TurboTax still gets an error when trying to con...