It's not working for me either. I get the same error of there not being any forms, although when I go to Vanguard, it has the forms to download.
When I search TurboTax in their Support Center, it says: If you use third-party tax preparation software like TurboTax, you’ll now be able to upload the data from your form using a document ID. This replaces the need to enter your Vanguard username and password.
So, how do I do that?
