At this point, you might be done with your taxes.  If you haven't yet dropped your envelope in the mail—or clicked the button to e-file, which is the faster method—I hope you've at least gotten the ball rolling.

But it's not too early to start thinking about next year, particularly if you have a hefty refund coming to you. I know—getting a burst of money at once is exciting, particularly in this down and out economy, but financially speaking, it's just not smart. 

When you get a tax refund, you're giving the IRS a free loan for an entire year, a year that you could have had that cash stashed in an interest-baring account, where it would have been working for you, not Uncle Sam. Not only that, but this year, because of budget trouble, some states, including California and Kansas, have had delays getting refunds out. "In California, this went back to January, so filing early wouldn't have helped. Truthfully, this is speaks more to being careful in your withholding," says Sherrill Gregory, an enrolled agent in California.

The idea, of course, is to configure your withholding on your W-4 so that the amount that is withheld from your paycheck each month more or less matches your estimated tax liability. That way, come April 15 of the following year, you don't get a refund, but you also don't owe. A good way to run your numbers is by using the Withholding Calculator on the IRS website.

Even if you've been with the same employer for years, it's not too late to make a change, says Roni Deutch, author of The Tax Lady's Guide to Beating the IRS. "You can adjust your withholding any day of the year.  But the longer you fail to adjust it, the longer you're going to be addicted to getting that refund check in April."

She's right, of course. You've come to count on that little windfall once a year, but wouldn't you rather have some extra each month to save for retirement, or pay down debt, or just make ends meet? So let's not put it off anymore. Tomorrow, when you go into work, go straight to your human resources manager (or your boss, if you work for a small company) and ask that he or she help you adjust your withholding. Then, stay on top of it, because many of life's milestones call for another look at your W-4, including marriage, divorce, a second job, birth of a child, the purchase of a home, capital gains and retirement. 

The 3 best ways to spend your tax refund

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