Well folks, I solved it.
While the problem occurred downloading from both the Microsoft Edge and Mozilla Firefox browsers, I tried one last time from the Brave browser with Defender, firewall and McAfee anti-virus turned off.
Not only did the file download fine, it had a legit Certificate for Intuit and was larger.
That file extracted and installed just fine.
Try this method instead of all the rigamarole Intuit Tech suggested. Much faster, simpler and easier.
