There is a good chance you are not having enough tax withheld if:
* You have more than one job at a time,
* Your spouse also works,
* You have income not subject to withholding, such as capital gains, rental income, interest, dividends, or
* You owe other taxes such as self-employment tax or household employment taxes.
I've never had that happen.
Hrm. Maybe you could start a small business and write lots of stuff off?
posted by drstein at 10:42 PM on January 29, 2007