DETROIT (WWJ) – Short on cash? You may be able to collect some of the $31 million that the IRS says it has for Michiganders who have not filed their 2007 income tax returns.

The IRS says there are nearly 31,000 people in Michigan who did not file a federal income tax return for 2007. In order to collect any money that’s due, a return for 2007 must be filed with the IRS no later than Monday, April 18, 2011. If no return is filed to claim a refund within three years, the money becomes the property of the U.S. Treasury.

According to the IRS, half of the potential refunds due from 2007 are for $663 or more. However, keep in mind that if you are due a refund, it will not be paid until returns for 2008 and 2009 have been filed.