IRS letters: what each one means and how to write your response

First: stay calm, and look at the date

The IRS sends letters for many reasons, and not all of them are bad. According to the IRS, it may write to you because you have a balance due, because your refund changed, because it has a question about your return, because it needs to verify your identity, because it corrected your return or because it is taking longer to process it.

What does matter is the deadline. If the letter asks you to respond, you must do so before that date. If you disagree, the IRS itself says to respond on time to preserve your appeal rights.

How to tell if the letter is really from the IRS

• Look for the notice number. It is in the right-hand corner of the letter: it starts with “CP” (notice) or “LTR” (letter). Look it up on the “Understanding your IRS notice or letter” page.
• Check your IRS online account. Some notices can be viewed and downloaded in your online account.
• If it doesn't show up or seems suspicious, the IRS says to call 800-829-1040. Don't call the number on a questionable letter and don't pay with gift cards: look the number up yourself on irs.gov.
• The IRS starts by mail. According to the IRS, its first contact is normally a letter by mail, not a phone call, a text message or an email.

The most common types of IRS letters

The deadlines you can't miss

There are two dates set by law that are worth knowing before they arrive.

The notice of deficiency (such as the CP3219A). It opens a 90-day period to ask the Tax Court to review the assessment:

“Within 90 days, or 150 days if the notice is addressed to a person outside the United States, after the notice of deficiency authorized in section 6212 is mailed […], the taxpayer may file a petition with the Tax Court for a redetermination of the deficiency.”

— IRC §6213(a)

The IRS will keep working with you during those 90 days, but that does not extend the deadline to go to the Tax Court. If the petition arrives late, the Court cannot hear your case.

The notice of intent to levy. Before levying, the IRS must notify you in writing at least 30 days in advance, except for some exceptions set by law:

“The notice required under paragraph (1) shall be— (A) given in person, (B) left at the dwelling or usual place of business of such person, or (C) sent by certified or registered mail to such person’s last known address, no less than 30 days before the day of the levy.”

— IRC §6331(d)(2)

And with the final notice (LT11 or Letter 1058) you have 30 days to request a hearing before the IRS Independent Office of Appeals (IRC §6330). That's why these letters don't get left in a drawer.

How to write your response letter to the IRS

If the notice comes with a response form, use it: fill it out, sign it and check whether you agree or not. If it doesn't, follow the notice's instructions and write a short letter. Here is a structure that works:

1. Your information: full name, address and your Social Security number or ITIN exactly as they appear on the notice.
2. What you are responding to: the notice number (for example, CP2000), the tax year and the date of the letter.
3. Your position in one sentence: “I agree,” “I partially agree” or “I disagree.”
4. Why, point by point and to the point. For example: “The $4,800 Form 1099-NEC from Company X is already included on my Schedule C, line 1.”
5. The list of documents you are enclosing: copies of corrected forms, receipts, account statements or letters from whoever misreported the income. Copies, not originals.
6. Your phone number and the best time to call you.
7. Your signature and the date. If it was a joint return, both spouses sign when the notice asks for it.

Send it to the address in the upper left-hand corner of the notice, or by fax or with the IRS Documentation Upload Tool if the notice allows it (that's what the IRS indicates for CP2000 and CP3219A notices). Keep a copy of everything you send and proof of when you sent it.

If the error was made by whoever reported your income (a duplicate 1099, a W-2 with a wrong figure), ask that company for a corrected form or a letter explaining it, and let the IRS know you are waiting for it.

If you can't pay it all

Pay what you can before the date: according to the IRS, that reduces penalties and interest. For the rest you can request an online payment plan. In cases of serious financial hardship, the IRS may temporarily delay collection.

The mistakes that cost the most

When it makes sense to ask for help, and from whom

For an authorized representative to handle your case before the IRS, Form 2848 is used. If you only want another person to talk to the IRS about a CP2000, the response form has its own authorization section. Not every professional can do the same things. According to the IRS:

• Attorneys, CPAs and enrolled agents (EAs) have unlimited representation rights: audits, collections and appeals.
• Preparers in the Annual Filing Season Program (AFSP) have limited representation rights: only for returns they prepared and signed, and only before revenue agents (examination), customer service representatives and similar IRS employees, including the Taxpayer Advocate Service. Never before revenue officers (collection), Appeals or the Tax Court.

If your case involves collection, a levy, an appeal or a complex audit, look for a CPA, an EA or an attorney. Free help also exists: the Taxpayer Advocate Service (TAS) and Low Income Taxpayer Clinics.

We help you identify the type of notice and gather and organize the documents it asks for. If the letter is about a return we prepared, we stand by you within the AFSP's limited representation. If not, or if your case requires a representative with full authority, we connect you with a CPA, an EA or an attorney.

Your rights with the IRS

Every taxpayer has the rights in the Taxpayer Bill of Rights (IRC §7803(a)(3)), including the right to be informed, the right to challenge the IRS's position and be heard, and the right to appeal in an independent forum. They are explained in Publication 1. And if you prefer that the IRS write to you in another language, you can indicate it with Schedule LEP, which is filed with your annual return. The IRS warns that you will keep receiving letters in English until they are translated.

Frequently asked questions

How do I write a letter to the IRS?

Use the response form if the notice includes one. If not, write a short letter with your information and your SSN or ITIN as they appear on the notice, the notice number and the year, whether you agree or not, the reasons point by point, the list of documents you are enclosing (copies), your phone number, your signature and the date. Send it to the address in the upper left-hand corner of the notice.

How do I know if an IRS letter is real?

Look up the notice number (CP or LTR, in the right-hand corner of the letter) on irs.gov and check your IRS online account. If it doesn't show up or seems suspicious, call 800-829-1040, not the number on the letter.

What is an IRS CP2000 letter?

It is a notice that what third parties reported (your employer, your bank) doesn't match your return. It is not a bill: it is a review by mail that proposes a change. You respond with the form it includes, indicating whether you agree or not and attaching documents.

What happens if I don't respond to an IRS letter?

The IRS may send another notice and a bill, and in cases of tax debt it can go as far as levying wages or bank accounts. You also lose deadlines set by law, such as the 90 days to go to the Tax Court after a notice of deficiency (IRC §6213(a)).

How long do I have to respond to the IRS?

Whatever your notice says. Two deadlines are set by law: 90 days to go to the Tax Court after a notice of deficiency (IRC §6213(a)) and 30 days to request a collection hearing after the final notice of intent to levy (IRC §6330).

Can I ask the IRS to write to me in Spanish?

You can indicate your language preference with Schedule LEP, which is filed with your annual return. The IRS warns that it won't always be immediate: you will keep receiving letters in English until they are translated.

Sources

✓ Legal basis verified

IRC §6213(a) (90-day period to go to the Tax Court), IRC §6331(d) (30-day notice before a levy), IRC §6330 (collection hearing) and IRC §7803(a)(3) (Taxpayer Bill of Rights). Official IRS pages consulted on October 1, 2026: Understanding your IRS notice or letter, the CP14, CP2000, CP3219A, CP504, LT11/1058 and CP5071 notices, Annual Filing Season Program (AFSP) and Schedule LEP.

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