As the end of the year approaches, many people are scurrying to make year-end tax moves to minimize their bills in the coming tax season. But a lot of the advice taxpayers receive will be useless if they don't know about a key decision they'll have to make when filing their returns next year.

In the following video, Dan Caplinger, The Motley Fool's director of investment planning, looks at the key decision of whether to itemize deductions or take a standard deduction on your return. Dan notes that most year-end advice hinges on reducing your taxable income, with suggestions that include making gifts to charity, paying state and local taxes early, and prepaying medical expenses and other deductible costs. But as Dan points out, most of these deductions are only allowable if you itemize, making them essentially worthless if you take a standard deduction. Dan concludes by going through the 2013 standard deductions of $6,100 for single filers and $12,200 for married couples and running the numbers to help you make the decision about when you should itemize.