Normally, when you log into ItsDeductible directly, does it ask you for 2-factor authentication? You said you are able to log directly into ItsDeductible website without any problem.
Sign out of everything. Out of this forum, out of your online account, out of ItsDeductible. Close your browser.
Then try the import again from inside your desktop TurboTax. It should first ask "Do you have an account with ItsDeductible Online?"
When you say "yes", you should get a popup to enter your User ID and password. Make sure it's the one you normally use to log into ItsDeductible Online.
When you enter the User ID and password into that popup window, what happens next? Does it then ask you to confirm a factor though email, text, or phone call? And then you receive nothing?
