Just so you all are aware, many people, including myself, have experienced error 5639 and further inability to use TTAX. It happened to me this morning after I updated. TTAX needed to reboot my system, as usual, after the update and that's when the error popped up. You can clear the error from the screen but can do nothing further with TTAX. Intuit knows about it but there is no fix at this point. They tell you to use TTAX online while they're working on it :{ Not a solution.
This is the first time in years, maybe ever, that TTAX has completely been unusable for me. Very frustrated. It happens on a variety of OSs too. XP, Vista, Win 7....
jo