The IRS sends notices with codes like CP12, CP14, and others to tell you what they found during a review of your return or account. Each code points to a specific issue—a math error, a missing payment, a discrepancy between what you reported and what the IRS has on file. Understanding what the code means and what triggered the notice helps you figure out whether you need to respond, what documents matter, and what happens next.
These guides explain what each notice code actually signals, why the IRS sent it, and what the typical steps are after you receive one. You'll learn how to read the notice itself, what information the IRS is asking for, and whether the issue requires action on your part or straightforward a response to their inquiry.