I wrestled with the same Error 2 transmission problem for hours, running Win10. Turned off my Windows Firewall, deleted all cookies, browsing history, enabled all pop-ups, etc. Nothing worked. Even called TurboTax support, and they spent 45 frustrating mins with me trying to fix. They had no clue what to do. Then I saw this fix, and .... it worked! To be certain, be sure to click “Reset all zones to default level.”, AND also set the internet setting on the same screen from "Medium-High" to "Medium". I'm so grateful I didn't have to print 150+ pages of Federal and State return and mail it. Thank you larryntt!!
