As the April 15 filing deadline looms, the Internal Revenue Service reminds taxpayers that after three years, any unclaimed 2021 tax year refunds go to the U.S. Treasury.

The IRS has issued more than 29.6 million individual income tax refunds through Feb. 21, up 2.3% from a year ago.

Taxpayers eligible for the Earned Income Tax Credit for 2021 may also claim those funds if they file their returns for the year. Qualifying incomes are $21,430 for a single person without children or up to $57,414 for a married couple filing jointly with three or more qualifying children.

If you've already filed your tax return, it's natural to wonder when you'll receive your refund. One of the most common questions is the exact time the IRS makes deposits.