The IRS notice you received indicates you have taxes owed for tax year 2021. If you incorrectly indicated you were eligible for a tax credit or you did not report income on your tax return then the IRS changed your tax return resulting in the taxes owed. The notice gives you the option to either agree or disagree with the IRS.
You would need to contact the IRS for further assistance regarding this matter. Their phone number is800-829-1040. You can visit this link herefor more information.