I'm sending tax return Efile, my UFILE crashes during this process, it seems to send return anyways as when I finally try to send this return again to CRA, it says it already received it, I don't get confirmation page in Ufile because it crashes. This happens on PC running Windows 8.1 64bit, when I do the same on Windows 7 64bit no problems. I can't see any error as Ufile crashes with simple Windows App crash message.