Nearly $1 billion in outstanding refunds remain unclaimed from 2012. That represents an estimated one million taxpayers who might have qualified for a refund but who did not file a federal income tax return for 2012.
If you are due a refund, you must file a federal income tax return in order to get your money. You typically have a three year window following the return due date to claim your tax refund. To claim your refund for the 2012 tax year, your return must be postmarked on or before April 18, 2016 (or April 19, 2016, for taxpayers in Maine and Massachusetts).More Info