search.svg
[popup]
July 18, 2025 4 min read

Understanding Your IRS Notice

Home » Taxes » Understanding Your IRS Notice
Understanding what an IRS notice means is essential to responding appropriately. Here are some common IRS notices, what they mean, and how to respond.

Advertiser Disclosure: Our first priority is to provide valuable information to help our readers gain insight into financial topics. Although we receive compensation from some of the brands listed on our site, we only highlight companies we believe can benefit our readers and their financial situations.

It can be a bit frightening to receive a letter or notice from the IRS. Understanding what the notice means is essential to responding appropriately. Let’s take a look at some common IRS notices, what they mean, and the steps to take after receiving a notice.

Common Types of IRS Notices

Understanding the type of notice you’ve received is the first step toward resolving the issue efficiently. While IRS letters might look similar at first glance, they usually fall into a few main categories. Below is a breakdown of common types of IRS notices, what they typically mean, and how to respond to them:

Payment Issues

These notices are about taxes you owe, often with deadlines and consequences for not acting quickly:

  • CP521 – A reminder that your installment payment is due.

Return Issues

  • CP2000 – The IRS found a mismatch between your return and what third parties (like employers or banks) reported.
  • Letter 12C – Your return is missing documentation (like proof of income or a form related to the Premium Tax Credit).
  • Letter 2645C – The IRS is reviewing your submitted information and needs more time—this is more of a status update than a warning.

Identity Verification

Fraud prevention triggers these notices, often before a refund is issued:

  • Letter 5071C – You’ll need to verify your identity online or by phone before the IRS finishes processing your return.
  • Letter 4883C – Similar to 5071C, but typically more serious. Usually requires a phone call with specific verification details.
  • Letter 5747C – Requires in-person identity verification at a Taxpayer Assistance Center.

Audit

These notices start the audit process or notify you of the results:

  • Letter 525 – You’re under audit, and the IRS is proposing changes. This includes an Examination Report and your appeal rights.
  • Letter 3219 (Statutory Notice of Deficiency) – You have 90 days to respond or the IRS will assess the additional tax. You can dispute this by petitioning the U.S. Tax Court.

Other Common Notices

Not every IRS notice fits neatly into categories like payment issues, return discrepancies, identity verification, or audits. The IRS administers a wide range of programs, and as a result, it sends out notices related to everything from return corrections and filing requirements to penalties under the Affordable Care Act.

These “other” notices may not be as common as a CP14 or CP2000, but they’re still frequently issued—and just as important to understand and respond to. Some may affect individuals, while others are more relevant to business owners, employers, or taxpayers with complex filing situations. Here are several IRS notices that fall outside the main categories:

  • CP11 / CP12 – Return Adjustments
  • Letter 226J – Employer Shared Responsibility Payment (ESRP)
  • CP90 / Letter 1058 – Final Notice of Intent to Levy
  • Letter 2800C / 6800C – Information Return Issues

As with any notices from the IRS, it’s important to read them carefully, taking note of key information.

Next Steps

Receiving a notice from the IRS isn’t the end of the world, but it is something you should take seriously. Acting quickly and thoughtfully can often prevent small issues from becoming bigger problems. Often, it’s important to start by simply reading the notice carefully. The IRS typically provides a lot of information. Here are some steps you might take:

1. Read the Notice Carefully

  • The notice number
  • The tax year in question

Understanding exactly what the IRS is asking is key to responding appropriately.

2. Check the Deadlines

3. Compare the Notice to Your Records

Before responding, verify the IRS’s claims against your own records:

  • Did you already submit the requested documents?
  • Is the IRS referring to a return you already filed or amended?

Sometimes the IRS is right—other times, you may need to provide proof or correct a misunderstanding.

4. Respond or Pay Promptly

If the notice is correct and you owe money, it’s best to pay the balance as soon as possible to avoid interest and penalties. You might be able to do so through:

  • Installment agreements (monthly payments)
  • Offer in compromise (settle for less than you owe, in some cases)
  • Temporary delay of collection

If the notice requires documents or an explanation, follow the instructions and send a timely, clear response—preferably with copies of supporting records.

5. Consider Professional Help

For straightforward notices, you may be able to handle the issue on your own. But if you receive:

  • An audit letter
  • A notice of deficiency
  • Or if you simply don’t understand what the IRS is saying

Conclusion

IRS notices can be unsettling, but most are manageable if you take them seriously and respond quickly. Whether it’s a simple payment reminder or a more complex issue like an audit or identity verification, knowing what type of notice you’ve received is the first step toward resolution.

    close

      Disclosure

      Our first priority is to provide valuable information to help our readers gain insight into financial topics. Although we receive compensation from some of the brands listed on our site, we only highlight companies we believe can benefit our readers and their financial situations. Consumer Insite has partnered with CardRatings for our coverage of credit card products. Consumer Insite and CardRatings may receive a commission from card issuers.

      Advertiser Disclosure

      Our first priority is to provide valuable information to help our readers gain insight into financial topics. Although we receive compensation from some of the brands listed on our site, we only highlight companies we believe can benefit our readers and their financial situations. Consumer Insite has partnered with CardRatings for our coverage of credit card products. Consumer Insite and CardRatings may receive a commission from card issuers.

      To Get In Touch With The
      Consumer IN site Team

      17875 Von Karman, Suite 150, Irvine, CA 92614

      To Get In Touch With the Consumer Insite Advertising Team

      17875 Von Karman, Suite 150, Irvine, CA 92614

      Disclosure

      Our first priority is to provide valuable information to help our readers gain insight into financial topics. Although we receive compensation from some of the brands listed on our site, we only highlight companies we believe can benefit our readers and their financial situations.

      Advertiser Disclosure

      Our first priority is to provide valuable information to help our readers gain insight into financial topics. Although we receive compensation from some of the brands listed on our site, we only highlight companies we believe can benefit our readers and their financial situations.