The IRS warns that an estimated $1 billion in tax refunds from the 2021 tax year may become the property of the U.S. Treasury if over 1.1 million Americans do not file their tax returns by April

The median potential refund nationwide is $781 for 2021. Florida, with 69,800 individuals who did not file, is just below the median potential refund at $721. New Yorkers — 73,000 of them — left the most money in the IRS till: $995.