https://www.eztaxworks.com/received-an-irs-notice-complete-guide-to-Received a letter from the IRS? We understand how stressful it is, especially when you see a notice number such as CP14, CP2000, CP75, or CP504. However, an IRS Notice does not always mean you are being audited or that you have done something wrong. The IRS sends you a notice for many reasons, including unpaid taxes, changes to your return, identity verification, income discrepancies, refund reviews, and collection matters. When you receive such notice from the IRS, the first step is to read it carefully, identify the notice number, understand what IRS is asking for and respond by stated deadline when required. understanding-every-irs-letter