IRS letters range from routine reminders to serious enforcement warnings. Use our free notice lookup tool below to understand your situation — and know when to act immediately.
Select your notice number, answer two quick questions, and get plain-English guidance instantly.
These notices account for the vast majority of IRS letters received by individuals and businesses. Click any card to see full details in the tool above.
The IRS says you owe money on your taxes. This is the first formal balance-due notice. If ignored, it escalates to CP501, CP503, and eventually CP504 which triggers levy action.
→ Respond within 30 daysThe IRS received income information from a third party (employer, bank, 1099) that doesn't match your return. This is not an audit — but your response determines what you owe.
→ Respond within 60 daysThe IRS intends to seize your state tax refund or other property. This is a formal enforcement warning. Receiving this notice means prior notices were ignored — act immediately.
→ Seek legal help todayThis is the IRS's final warning before seizing wages, bank accounts, or other assets. You have 30 days to request a Collection Due Process hearing before enforcement begins.
→ 30-day appeal windowThe IRS is reviewing your return and has placed your refund on hold. This is a verification process — you usually do not need to take action unless you receive a follow-up notice (CP05A).
→ Wait up to 60 daysSimilar to CP90, this is a final notice informing you the IRS plans to levy your property. You have a right to a CDP hearing — but the request must be filed within 30 days of this notice date.
→ Request CDP hearing immediatelyGenerally an informational notice about your rights as a taxpayer or available disaster relief options. Usually does not require action — but read it carefully for any applicable deadlines or extensions.
→ Review for relevant deadlinesThe IRS is terminating your installment agreement due to missed payments or non-compliance. Once defaulted, the full balance becomes immediately due and levy action can begin.
→ Act within 30 daysYour business has an unpaid tax balance, typically related to employment taxes or business income. Business tax debts can lead to Trust Fund Recovery Penalty assessments against individuals.
→ Respond promptlySecond collection notice in the IRS sequence. Penalties and interest accrue daily — ignoring it triggers a CP503 and eventually CP504 levy action.
→ Respond within 21 daysThird and last reminder before the IRS issues a levy warning. A Notice of Federal Tax Lien may be filed at any time after this notice.
→ Levy warning is nextThe IRS intends to seize your state tax refund within 30 days, with wage and bank levies authorized to follow. This is the final warning before active enforcement.
→ 30-day windowThe IRS has formally proposed additional tax. You have exactly 90 days to petition U.S. Tax Court — this deadline cannot be extended, and missing it forfeits the right to challenge in Tax Court.
→ 90-day Tax Court deadlineThe IRS has no record of your filed return. If ignored, the IRS prepares a Substitute for Return using only income data — without your deductions or credits.
→ File immediatelyA follow-up to CP05 requesting specific documents — pay stubs, 1099s, or proof of credits — before the IRS releases your refund. Failure to respond can deny the refund.
→ Respond within 30 daysThe IRS flagged a return filed under your SSN as potentially fraudulent. Verify your identity to allow processing — or report identity theft if you did not file.
→ Verify within 30 daysThe IRS made changes to your tax return resulting in a balance owed. This is functionally a new tax bill — collection notices follow if it is not paid or addressed.
→ Respond within 21 daysThe estimated tax payments on your return don't match IRS records, resulting in a balance due. Often caused by misapplied payments and frequently correctable.
→ Verify payment recordsThe IRS adjusted a business tax period — could result in balance due, refund, or zero change. Not an audit, but you have the right to dispute.
→ Review and respondYour refund was used to pay an outstanding federal tax balance from a prior year. Informational notice — no action needed unless the underlying debt is incorrect.
→ Verify the offsetAnnual reminder confirming an unpaid balance plus accrued penalties and interest. The CP71C variant warns of passport revocation for seriously delinquent debts.
→ Reassess resolution optionsConfirmation that your business was assigned an Employer Identification Number. Retain permanently — the IRS does not reissue this exact letter.
→ Store permanentlyThe first few days matter. Here is exactly what to do — in order — to protect your rights and resolve the issue with the fewest costs.
Look in the top right of the letter for a code like CP14, CP2000, or LT11. This identifies exactly what the IRS is communicating and how urgent it is.
Most notices give 30 to 60 days from the notice date — not the date received. Missing the deadline can permanently limit your options.
Pull your tax return and supporting records. Compare the IRS's figures against yours — notices sometimes contain errors that can be corrected.
If you agree, follow the payment instructions. If not, you have the right to dispute in writing with documentation — usually more effective than calling.
For levy threats, large balances, business penalties, or audits — professional representation prevents costly missteps and protects your legal rights.
The IRS groups its communications into categories. Understanding which category your notice falls under tells you how urgently you need to act.
These notices inform you that the IRS believes you have an unpaid tax liability. They follow an escalating sequence: CP14 → CP501 → CP503 → CP504 → CP90 / LT11. Each step brings the IRS closer to enforcement action. The critical mistake most people make is ignoring early notices, which allows the clock to run toward levy action. If you receive any notice in this sequence beyond CP501, it is wise to consult with a tax attorney before responding.
Key notices: CP14, CP501, CP503, CP504, CP504B, CP90, LT11These notices arise when information reported on your return does not match records the IRS has received from employers, financial institutions, or other third parties. CP2000 is the most common — it proposes additional tax based on unreported income. You have the right to agree, partially agree, or dispute the proposed change. The response you send will either resolve the issue or trigger further examination. Always review the specific income items being challenged before responding.
Key notices: CP2000, CP2501, Letter 525, Notice of DeficiencyThe IRS made a math correction or adjustment to your return, which may result in a different refund amount or a new balance due. Notices like CP12, CP21, CP23, and CP24 typically explain what was changed and why. If you agree with the adjustment, no action is needed. If you disagree, you have 60 days to dispute the change by sending a written explanation. Keep in mind that a refund delay notice (CP05) does not require action unless followed by a CP05A.
Key notices: CP12, CP21, CP22A, CP23, CP24, CP05, CP05AThe IRS has assessed a penalty for late filing, late payment, accuracy errors, or failure to deposit payroll taxes. Many penalties can be reduced or eliminated through a First-Time Penalty Abatement request or by demonstrating reasonable cause. Do not simply pay a penalty notice without evaluating whether you qualify for abatement — it is frequently available, especially for taxpayers with a clean compliance history.
Key notices: CP30, CP161, CP210, CP215, CP220These are the most serious IRS communications. A Notice of Federal Tax Lien attaches to your property and damages your credit. A levy allows the IRS to seize wages, bank accounts, Social Security payments, or other assets. Before levying, the IRS is required by law to send a Final Notice of Intent to Levy — this triggers your 30-day window to request a Collection Due Process (CDP) hearing, which temporarily stops enforcement while you pursue alternatives such as an Offer in Compromise, Currently Not Collectible status, or an installment agreement.
Key notices: CP90, CP297, LT11, Letter 1058, CP504B, CP523
Not every notice is equally urgent. But certain situations require you to act within days — not weeks. Here is how to assess your risk level.
| Situation | Urgency | What Can Happen If Ignored | Time to Act |
|---|---|---|---|
| Notice mentions levy, seizure, or garnishment | Critical | Wages, bank accounts, or property can be seized | Within days — request CDP hearing |
| Final Notice of Intent to Levy (CP90, LT11) | Critical | IRS can begin enforced collection after 30 days | 30 days from notice date |
| Notice of Deficiency (90-day letter) | Critical | You lose the right to contest the tax in Tax Court | 90 days — do not miss this |
| Installment agreement default (CP523) | Critical | Full balance due immediately, levy risk resumes | 30 days to cure default |
| Balance due notice (CP14, CP501) | High | Interest and penalties accumulate; escalates to levy | 30 days to respond or arrange payment |
| Underreporter notice (CP2000) | High | IRS assesses additional tax if not disputed | 60 days to respond |
| Refund hold (CP05) | Moderate | Refund delayed; may become CP05A requiring documents | Wait up to 60 days; act if CP05A arrives |
| Account adjustment or math error (CP12, CP21) | Low | If you agree, no action needed; dispute within 60 days | 60 days if you disagree |
An IRS notice is an official letter from the IRS about your tax account — typically regarding a balance owed, a return discrepancy, a refund adjustment, or an enforcement action. The notice code in the upper right corner (e.g., CP14, LT11) identifies what the IRS is communicating and how urgent it is.
Urgency depends on the notice type. Balance-due notices like CP14 typically allow 30 days. Final levy notices like CP90 and LT11 trigger a strict 30-day window before the IRS can seize wages or bank accounts. A Notice of Deficiency gives 90 days to petition Tax Court — and that deadline cannot be extended by the IRS.
Each ignored notice triggers a more serious follow-up. CP14 escalates to CP501, then CP503, then CP504 — and eventually to a Final Notice of Intent to Levy (CP90 or LT11). Once the IRS has levy authority, it can garnish wages, freeze bank accounts, or seize property without further warning.
Look in the top right corner of the letter for a code like CP14, CP2000, or LT11. Enter that code in the lookup tool above to see a plain-English explanation, urgency assessment, and your immediate next steps.
Yes. Most IRS notices include written-dispute instructions, and a written response with documentation is usually more effective than a phone call because it becomes part of your permanent record. Attorney representation is recommended for larger amounts or notices with strict legal deadlines.
Both involve levy threats but at different stages. A CP504 is a Notice of Intent to Levy your state tax refund and warns that wage and bank levies may follow. A CP90 — and the equivalent LT11 or Letter 1058 — is the Final Notice of Intent to Levy, which triggers your 30-day right to a Collection Due Process hearing and is the last legally required notice before the IRS can seize wages or bank accounts.
Not always. Simple math-error adjustments, refund holds, and small balance-due notices can often be handled directly. Attorney representation is strongly recommended when the amount exceeds $10,000, the notice involves levy or lien language, you've received a Notice of Deficiency, or you face a business tax issue with potential personal liability.
Real IRS notices arrive by mail and reference your specific tax year, an official notice code (CP or LT), and your SSN or EIN. The IRS does not initiate contact by email, text, or social media. Verify by logging into your account at IRS.gov or calling the toll-free number printed directly on the notice — never use a phone number from a separate document or website.
A CDP hearing is your right to have an IRS Office of Appeals officer review your case before the IRS takes levy action or after a federal tax lien has been filed. Requesting a hearing within 30 days of a Final Notice of Intent to Levy temporarily stops enforcement and lets you negotiate alternatives like an Installment Agreement, Offer in Compromise, or Currently Not Collectible status. Form 12153 starts the process.
Yes. Once a Final Notice of Intent to Levy has been issued and the 30-day window has passed, the IRS has broad authority to seize wages, bank accounts, vehicles, retirement accounts, business assets, and even real estate. Primary residences require additional approval and are rarely seized in practice, but the threat is real. Acting during the notice period is the most effective prevention.
We help individuals and business owners across the country resolve IRS and state tax debt, unfiled returns, audits, and other complex tax issues. Our team also provides guidance on future compliance so you can move forward with lasting peace of mind and leave tax problems in the past.
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