Still not working. At my wits end. Tried workarounds etc.. In the end, had to download all the tax docs manually and input by hand. Wasted too much time on this...

This does not help. Enabled 3rd party access and still get same issue: Login unavailable, please contact customer support. Frustrating.

Same issue here on TurboTax Mac desktop version. Get to login page and type in my information to get this error: Login is not available, please contact customer...