Getting a letter from the IRS is unsettling, but most IRS notices are not as serious as they look. Many are routine requests for information, notification of minor adjustments, or balance due reminders. The key is understanding what each notice actually says, responding within the deadline, and knowing when the situation requires professional help. Ignoring IRS mail is the one thing that turns a manageable situation into a serious one.
First: Verify It Is Real
IRS scams are rampant. The real IRS communicates by mail to your address on file - not by phone calls demanding immediate payment, not by email, not by text message. If you receive a call claiming to be from the IRS demanding immediate payment or threatening arrest, hang up. It is a scam. If you receive a letter and want to verify it, call the IRS directly at 1-800-829-1040 using the number from IRS.gov - not the number on the letter.
The Most Common IRS Notices
CP2000
Proposed Changes to Your Tax Return - Income Mismatch
The IRS received 1099s, W-2s, or other income reports that do not match your tax return. The CP2000 proposes additional taxes, penalties, and interest based on the difference. This is not a bill - it is a proposal. You have the right to agree or disagree.
Deadline: typically 60 days from the notice date. If you agree, respond with payment or payment agreement. If you disagree (because you reported the income differently, the 1099 was incorrect, or you have offsetting deductions), respond in writing with documentation explaining your position. Do not ignore - if you do not respond or an agreement is not reached, the IRS will send a Statutory Notice of Deficiency (90-day letter) and, absent a Tax Court petition, will assess the proposed amount.
CP11 / CP12
Math Error - Changes Made to Your Return
The IRS made a math correction to your return. CP11 means the correction resulted in a balance due. CP12 means it resulted in a reduced refund. The IRS has already made the change - you are being notified after the fact.
Review the notice to understand what was corrected. If you believe the IRS made an error, you have 60 days to request an abatement of the adjustment. If you agree, pay any balance due or accept the reduced refund.
CP14
First Notice of Balance Due
You have unpaid taxes for a specific year. This is the first collection notice. Interest and failure-to-pay penalties are accruing daily on the unpaid amount.
Pay the balance in full to stop interest accrual, or contact the IRS to set up a payment plan (installment agreement). If you cannot pay, explore Currently Not Collectible status or an Offer in Compromise. Do not ignore - ignoring CP14 leads to CP501, CP502, CP503, and eventually levy notices.
CP501 / CP502 / CP503
Reminder Notices - Balance Still Owed
Follow-up reminders after CP14. The balance is increasing as interest and penalties accrue. These are the escalating collection sequence before the IRS proceeds to enforce collection.
Respond and pay or set up a payment arrangement before the sequence reaches the levy stage. Each notice gives you an opportunity to resolve the balance before more aggressive collection begins.
LT11 / Letter 1058
Final Notice of Intent to Levy - Your Rights to a Hearing
This is a serious notice. The IRS is informing you it intends to seize (levy) your wages, bank accounts, Social Security benefits, or other assets. This is the last notice before enforcement action. It also notifies you of your right to a Collection Due Process (CDP) hearing.
You have 30 days from the notice date to request a CDP hearing. Filing a CDP hearing request stops the levy while the hearing is pending. Miss this 30-day window and you lose your most important protection against immediate levy. If you receive LT11 or Letter 1058, consult a tax professional immediately - this is not a situation to navigate alone.
CP90 / CP297
Final Notice of Intent to Levy and Notice of Your Right to a Hearing
The IRS intends to levy certain assets for unpaid taxes and is informing you of your right to a Collection Due Process hearing. CP90 is for individuals; CP297 is for businesses.
Act immediately. Contact the IRS or a tax professional the same day. Request a Collection Due Process hearing on Form 12153 within the deadline stated on the notice (generally 30 days under IRC §6330) to contest the levy, or make payment arrangements. Time is critical.
CP504
Urgent Notice - Notice of Intent to Levy (IRC §6331(d))
This is your Notice of Intent to Levy under IRC §6331(d). If you do not pay immediately, the IRS can levy your wages and bank accounts, seize property or rights to property, and apply your state tax refund to your federal balance.
Respond to the underlying balance. The state refund levy may already have occurred by the time you receive this notice.
Your Rights When You Receive an IRS Notice
The Taxpayer Bill of Rights (codified at IRC §7803(a)(3)) gives you specific rights in every IRS interaction. The most important ones when dealing with notices:
- Right to be informed - the IRS must explain what it wants and why
- Right to challenge the IRS's position - you can respond to any proposed change
- Right to appeal - you can request an independent review through IRS Appeals
- Right to retain representation - you can have a CPA, attorney, or enrolled agent represent you in any IRS proceeding
- Right to a Collection Due Process hearing - before the IRS levies your property, you have the right to a hearing before an independent IRS Appeals officer
- Right to contact the Taxpayer Advocate Service - if you are experiencing a hardship or the IRS is not responding appropriately, the TAS (1-877-777-4778) is an independent IRS organization that can intervene
First-Time Penalty Abatement (FTA). If you have a clean compliance history (no penalties in the prior 3 years), you may qualify for first-time penalty abatement of the failure-to-file, failure-to-pay, or failure-to-deposit penalty (and, beginning summer 2026 for 2025 tax year returns and later, for the IRS's Automatic Exemption from Penalty without a request). FTA is available by simply calling the IRS or writing a letter - no special form required. It can eliminate hundreds or thousands of dollars in penalties. Ask for it when you call.
Authority: IRC §6212 (notice of deficiency - the 90-day letter; taxpayer right to petition Tax Court); IRC §6213 (restrictions on assessment - IRS cannot assess tax before the 90-day letter period expires); IRC §6321-6323 (federal tax lien - arises when demand for payment is made and taxpayer refuses or neglects to pay); IRC §6330 (Collection Due Process hearing - right to hearing before levy; 30-day request window after LT11 or Letter 1058); IRC §6331 (levy - IRS authority to seize wages, bank accounts, and property after final notice); IRC §6343 (release of levy); IRC §7803(a)(3) (Taxpayer Bill of Rights - codified right to be informed, right to challenge IRS position, right to appeal, right to retain representation, right to a fair and just tax system); IRC §6651 (failure to file and failure to pay penalties); IRC §6656 (failure to deposit penalty); First-Time Penalty Abatement (administrative policy under IRM 20.1.1.3.3.2.1); IRS Publication 594 (The IRS Collection Process); IRS Publication 1 (Your Rights as a Taxpayer - Taxpayer Bill of Rights summary); Taxpayer Advocate Service: 1-877-777-4778 or taxpayeradvocate.irs.gov.