The IRS is warning that $1 billion in unclaimed 2021 tax refunds remain because about 1 million taxpayers haven't filed tax return for that tax year as an April 15 deadline looms.

The IRS warns that low- and moderate-income taxpayers could also be missing out on the Earned Income Tax Credit (EITC), which was worth as much as $6,728 for qualifying families.Eligibility for the EITC depended on household size and income:Up to $57,

The IRS estimates that over $1 billion in unclaimed tax return refunds are owed to over 1.1 million people, with an average of $781 per person, and that low-and-moderate income workers may be eligible for the 2021 Earned Income Tax Credit.