More than a million American taxpayers could be leaving cash on the table as the deadline to claim tax refunds from three years ago is fast approaching. The Internal Revenue Service (IRS) has issued a warning that more than a million taxpayers are still eligible to receive a share of more than $1 billion in refunds—but they need to act quickly.

The IRS estimates that more than $1 billion in refunds remain unclaimed by taxpayers who have not filed their Form 1040.

More than 1.1 million Americans are owed a share of over $1 billion in unclaimed tax refunds, but time is running out to collect, the Internal Revenue Service (IRS) has announced. Taxpayers have until Tuesday,