I just did our 2007 taxes, and unfortunately I mistakenly made a few assumptions when estimating what our withholdings should be last year.....and now we owe the tax man a big ole chunk of change.
Guess it's beans and rice for us for a while. But on the bright side, we should be able to tighten our belts literally and figuratively by paring down on our unnecessary spending (eating out being our main offense on both fronts).
Oh well...even accountants make mistakes! :)