@calidianne You may have already tried all of these things, but this is what worked for me.
1. I quit out of TurboTax completely and then restarted it to make sure I had the most up-to-date version. This allowed me to progress from the “check your Internet connection” error to entering my login credentials, where I encountered the “login unavailable” error.
2. I checked in Security Center in my Schwab account that I had third-party access enabled (I did).
3. I cleared my browser history. This is what finally made it work for me, although, like others, I did not see any $ amounts next to my 1099-Bs on the import screen, but all the data imported correctly.
