Unclaimed income tax refunds worth more than $1.5 billion await an estimated 1.4 million individual taxpayers who did not file a 2016 federal income tax return, according to the Internal Revenue Service.
To collect refunds for tax year 2016, taxpayers must file their 2016 tax returns with the IRS no later than this year's extended tax due date of July 15, 2020.
In cases where a federal income tax return was not filed, the law provides most taxpayers with a three-year window of opportunity to claim a tax refund. If they do not file a tax return within three years,
the money becomes the property of the U.S. Treasury.