I had exactly the same problem on Mac TurboTax Deluxe downloaded: ready to e-file but kept getting "technical hiccup" with just "cancelled" as the reason. Not particularly conducive to troubleshooting! I tried removing cookies and enabling pop-ups, but those suggestions did NOT solve the problem.
Solution: Though I didn't receive any notification of updates when I restarted TurboTax, I *manually* checked for updates, and found that there were updates to be installed! When I installed those updates and restarted TurboTax, the e-files went through with no problems.
