Federal income tax refunds totaling $1 billion may be waiting for an estimated one million taxpayers who did not file a federal income tax return for 2011, the Internal Revenue Service announced today. To collect the money, these taxpayers must file a 2011 tax return with the IRS no later than Wednesday, April 15, 2015.

“Time is running out for people who didn’t file a 2011 federal income tax return to claim their refund,” said IRS Commissioner John Koskinen. “People could be missing out on a substantial refund, especially students or part-time workers. Some people may not have filed because they didn’t make much money, but they may still be entitled to a refund.”

The IRS estimates half of the potential refunds for 2011 are more than $698.

In cases where a tax return was not filed, the law provides most taxpayers with a three-year window of opportunity for claiming a refund. For 2011 tax returns, the window closes on April 15, 2015. If no return is filed to claim a refund within three years, the money becomes property of the U.S. Treasury.

The law requires the tax return be properly addressed, mailed and postmarked by that date. There is no penalty for filing a late return that qualifies for a refund.

The IRS reminds taxpayers seeking a 2011 refund that their checks may be held if they have not filed tax returns for 2012 and 2013. In addition, the refund will be applied to any amounts still owed to the IRS, or their state tax agency, and may be used to offset unpaid child support or past due federal debts, such as student loans.

Current and prior year tax forms and instructions are available on the IRS.gov Forms and Publications page, or by calling toll-free: 800-TAX-FORM (800-829-3676). Taxpayers who are missing Forms W-2, 1098, 1099 or 5498 for the years: 2011, 2012 or 2013 should request copies from their employer, bank or other payer.

If these efforts are unsuccessful, taxpayers can get a free transcript showing information from these year-end documents by going to IRS.gov. Taxpayers can also file Form 4506-T to request a transcript of their tax return.

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