Glossary

The IRS CP16 Notice informs taxpayers that their refund or overpayment has been used to pay off a balance due from a previous tax year.

The IRS CP161 Notice informs businesses of an outstanding balance due on their tax return and provides instructions for paying the amount owed.

The IRS CP161A Notice reminds businesses of their outstanding tax balance and provides details on payment options to resolve the debt.

IRS CP18 notifies taxpayers that deductions or credits claimed on their return appear incorrect, and the IRS will review or adjust the return accordingly.

The IRS CP18 Notice informs taxpayers of discrepancies in claimed credits and details any adjustments made to the return.

The IRS CP19 Notice informs taxpayers that discrepancies were found in their reported income and provides details on the adjustments made.

The IRS CP2000 Notice alerts taxpayers that there is a discrepancy between the income they reported and the income reported to the IRS by third parties.

IRS CP2000 Notice notifies taxpayers of income discrepancies and proposes additional tax owed if no adjustments are made.

The IRS CP2005 Notice confirms that after reviewing the taxpayer’s return, no changes are required, and no further action is necessary.

IRS CP2057 Notice notifies taxpayers of adjustments made to their information returns, which could affect their reported income and tax liability.

IRS CP2057 Notice alerts taxpayers of potential unreported income and invites them to correct or clarify discrepancies to avoid penalties.

The CP21 notice notifies taxpayers that a change has been made to their tax account, which may affect their balance due or refund amount.

IRS CP210 informs taxpayers that adjustments have been made to their account, which may result in a balance due, credit, or refund.

The IRS CP21A Notice informs taxpayers that their return was adjusted, resulting in additional tax owed.

IRS CP21C Notice notifies taxpayers that changes to their tax return have resulted in an additional balance owed and explains how to pay the new balance.

The CP22 notice notifies taxpayers of changes made to their tax account, potentially affecting their balance due or refund status.

The CP22A notice is sent when the IRS makes changes to a taxpayer’s return, resulting in a balance due.

The IRS CP22A Notice notifies taxpayers that changes to their tax return have resulted in a balance due and provides steps for making a payment.

The IRS CP22E Notice informs taxpayers of changes made to their return after an examination, with a balance now due.

The CP23 notice notifies taxpayers of discrepancies between their estimated tax payments reported and those in the IRS’s records, which may result in a balance due.