The Internal Revenue Service is warning millions of Americans they might miss out on $1 billion in refunds if they don't act fast. Roughly 1.1 million Americans still have unclaimed tax refunds for 2021 that will disappear after April 15.

The IRS has issued a crucial warning to millions of Americans: act quickly or risk losing out on $1 billion in unclaimed tax refunds from 2021. With the deadline fast approaching, taxpayers must take immediate steps to secure their refunds before they vanish.

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