I wasted almost an hour on the phone with tier 1 tech support chatting with tier 2, only to be told I should either uninstall Bitdefender Internet Security or request a refund. I've been using TurboTax for many years and never had this issue before. What a joke for a software company to recommend you uninstall your anti-virus and firewall to get their software to work. Guess I will need to look elsewhere in future years...
FWIW - quitting my Google Drive and OneDrive sync applications made no difference.
