I agree there should be a way to do this. But the fact is, there isn't. At least not this year. But it's really not the program you need to be concerned with. You need to delete your tax data file from the computer before you go giving or selling it to someone else - or before you throw it away if it comes to that.
I don't know much about MACS. But I do know there's a way to do what I call a "factory reset" that removes all programs and data, reformats the HD and reinstalls the OS to the way it was when you originally purchased it. So aside from physically removing and destroying the HD before you dispose of the computer, I'd suggest you seek the "factory restore" route first.
