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You received a CP515 notice to inform you that we still have no record that you filed your prior tax return or returns.

You may qualify to receive the Child Tax Credit (CTC), or receive additional Child Tax Credit, for 2021, but you need to file a 2021 income tax return to claim the credit.

We rejected your application for an individual taxpayer identification number (ITIN). You may not be eligible for an ITIN. Your documents may be invalid. We may not have received a reply when we asked for more information.

We corrected one or more mistakes on your tax return. These changes affected the estimated tax payment you wanted applied to your taxes for next year.

As a result of your recent audit, we made changes to your tax return for the tax year specified on the notice. You owe money on your taxes as a result of these changes.

We made changes to your tax return because we found a miscalculation. As a result of these changes, you have a balance due.

We made changes to your railroad retirement tax return because we believe there was a miscalculation. As a result of these changes, you have a balance due.

CP544 notice is sent to payers to discontinue backup withholding on Jan 1st.

We corrected your return because we found a difference between the amount of estimated tax payments on your tax return and the amount we posted to your account.

If you received an IRS CP01A Notice, the IRS is explaining how to use your Identity Protection Personal Identification Number (IP PIN).