Short answer
Confirm the notice is real (the IRS makes first contact by mail and never demands gift cards), find the notice number and response date, then reply in writing with the response form, a short letter and copies of proof. A CP2000 gives you about 30 days and is a proposal, not a bill; an LT11 gives you 30 days to request a Collection Due Process hearing before the IRS can levy. Penalties are often removable through first-time abatement if your prior three years were clean.
Key takeaways
- The IRS initiates contact by U.S. mail; a real notice carries a notice number you can look up on irs.gov and a balance you can confirm in your IRS online account.
- A CP2000 proposes tax from a third-party mismatch and is answered in writing by the date on the notice, usually 30 days; do not file an amended return in response.
- CP14 and CP161 are balance-due bills; CP504 is a levy warning; LT11/Letter 1058 gives you 30 days to file Form 12153 before wages and bank accounts can be levied.
- A CP2100 means TIN mismatches on your 1099s: send B notices within 15 business days and start 24% backup withholding if a payee does not respond within 30 business days.
- First-time abatement removes failure-to-file, failure-to-pay and failure-to-deposit penalties if the prior three years were penalty-free and all returns are filed.
- Individuals can set up a payment plan online for balances under $100,000 (short-term) or $50,000 or less (long-term); businesses must call 800-829-4933.
In this guide
An envelope from the IRS leads people to do one of two bad things: pay whatever the letter says without checking whether it is right, or put it in a drawer. In our experience a large share of the notices owners bring us are wrong, partly wrong, or fixable with one letter. Almost none are emergencies the day they arrive; every one becomes one if ignored for ninety days.
The IRS runs on deadlines and paper. Read the notice number, find the response date, and answer in writing with the right documents, and you will resolve most of these yourself or with a few hours of professional help.
First, make sure it is really the IRS
The IRS normally makes first contact by U.S. mail. It does not text you, message you on social media, or call demanding immediate payment by gift card or wire transfer. A real notice has a notice or letter number in the corner (CP2000, CP14, LT11, Letter 1058), a tax year, and a phone number that matches one published on irs.gov. Search the notice number at irs.gov to find the page describing it, and confirm any balance in your IRS online account, which the IRS recommends for this purpose.
Two more tells. Scam letters rush and threaten you: arrest, license revocation, a 48-hour "final warning." Real notices give you weeks and explain your appeal rights. When in doubt, call the IRS main line, not the letter's number.
The notices small businesses actually get
| Notice | What it means | Your deadline | First move |
|---|---|---|---|
| CP2000 | Third-party forms (1099s, W-2s, 1099-K) do not match your return; the IRS proposes more tax. Not a bill, not an audit. | Date on the notice, usually 30 days | Compare each item to your return; respond in writing |
| CP14 | Balance due on a filed return; first bill in the collection sequence. | Due date on the notice | Verify against your records; pay or set up a plan |
| CP161 | Balance due on a business account (Form 941, 1120-S, 1065). | Call within 10 days if you think it is wrong | Pull deposit history; misapplied payments are common |
| CP2100 / CP2100A | Name/TIN mismatches on 1099s you filed. | Send "B notices" within 15 business days | Mail a B notice and W-9; start 24% backup withholding if no reply in 30 business days |
| CP220 / CP504J | Payroll deposit penalties or unpaid employment tax. | Date on the notice | Match deposits to Form 941; request first-time abatement |
| CP504 | Notice of Intent to Levy; the IRS can take your state refund first. | Pay immediately or set up a plan | Contact the IRS; Collection Appeals Program available |
| LT11 / Letter 1058 | Final Notice of Intent to Levy with hearing rights; wages and bank accounts are next. | 30 days to file Form 12153 | Request the hearing or resolve the balance |
| CP3219A | Notice of Deficiency, sent when a CP2000 went unresolved. | 90 days to petition Tax Court; no extensions | Send documents now or file the petition |
The sequence matters. An ignored CP14 or CP161 becomes a CP504, then an LT11. The LT11 has a hard legal clock: 30 days to request a Collection Due Process hearing, which pauses levy action while Appeals reviews your case. Miss it and the IRS can levy a business bank account with no further warning.
How to reply
Read the whole notice and match every line to your records: the return as filed, your IRS account transcript, proof of payments, the 1099s and W-2s you received. Then respond in writing by the response date, even if the response is "I need more time." A call can buy a short extension, but it leaves no record.
A good response has four parts: the signed response form, a one-page letter saying whether you agree, partly agree or disagree and why, copies of the documents that prove it, and the first page of the notice on top. Send it the way the notice says: the IRS upload tool if offered, otherwise fax or certified mail. Never send originals. For a CP2000, do not file an amended return unless you have changes beyond what the notice proposes; the IRS says so directly, and an amended return crossing your response in the mail creates months of confusion.
If someone else will handle it, that person needs authority. Form 2848, Power of Attorney, lets a CPA, enrolled agent or attorney speak to the IRS for you, receive your notices and sign agreements; Form 8821 only lets someone see your information. An enrolled agent is licensed by the Treasury Department specifically to represent taxpayers before the IRS, with the same unlimited practice rights as a CPA or attorney in examinations, collections and appeals.
Penalties and payment plans
Penalties you can often get removed
The penalty is frequently the part worth fighting. Failure to file costs 5% of the unpaid tax per month, up to 25%, with a $525 minimum for individual returns more than 60 days late that were due after December 31, 2025. Failure to pay costs 0.5% per month, also capped at 25%; it drops to 0.25% under an approved installment agreement if you filed on time, and rises to 1% if you ignore a levy notice for 10 days. Payroll deposit penalties run 2% (1 to 5 days late), 5% (6 to 15 days), 10% (over 15 days) and 15% after a demand for immediate payment. A CP2000 usually adds a 20% accuracy-related penalty. Interest runs on all of it, at 7% compounded daily for the quarter starting October 1, 2026.
First-time abatement removes those three penalties if you filed all required returns, paid or arranged to pay the tax, and had no penalties on the same type of return for the prior three years (twelve quarters for Form 941). It covers Forms 940, 941, 1040, 1065 and 1120, you request it by phone or with Form 843, and you do not have to give a reason. If you do not qualify, reasonable cause is the second path: a written explanation (illness, disaster, a preparer who disappeared) with evidence. The accuracy-related penalty is not covered by first-time abatement, but it disappears when the adjustment does.
If the balance is right and you cannot pay it
Pay what you can by the due date; every dollar reduces penalties and interest. Individuals, including sole proprietors and S corporation owners with a personal balance, can apply online for a short-term plan (up to 180 days) if they owe less than $100,000, or a long-term installment agreement if they owe $50,000 or less and have filed all returns. The long-term setup fee is $29 with direct debit or $69 without. Business accounts cannot use the online tool; a business calls the number on its notice or 800-829-4933, or files Form 9465. See the IRS payment plans page.
Unpaid payroll tax is different. The withheld portion belongs to your employees, and the IRS can assess it personally against any owner or officer who controlled the money, regardless of entity. Resolve a payroll tax balance first, ahead of income tax and most vendors.
Worked example: a CP2000 caused by a missing 1099-K
Bayshore Fitness Studio is a Tampa S corporation with $310,000 of revenue. Its owner, Maria, opened the studio's Square account before the LLC had an EIN, so Square has her Social Security number on file. For 2025, Square issued a Form 1099-K for $64,000 of card receipts in Maria's name. Every dollar was reported on the studio's Form 1120-S. But the IRS matching program looked for $64,000 on Maria's personal return, found no Schedule C, and in August 2026 sent a CP2000 proposing to tax it as self-employment income: roughly $22,000 of income and self-employment tax, a $4,400 accuracy-related penalty and about $2,400 of interest. Just under $29,000.
The response took one afternoon. Maria checked "I do not agree" and attached a one-page letter explaining that the 1099-K reported receipts of Bayshore Fitness Studio LLC, an S corporation of which she is the sole shareholder, included in gross receipts on the studio's timely filed 2025 Form 1120-S. Behind the letter: page one of the 1120-S showing $310,000 of gross receipts, her Schedule K-1, a Square statement showing the deposits landing in the studio's business checking account, and the corrected W-9 she had just given Square moving the account to the LLC's EIN. She uploaded it through the link on the notice and kept a PDF. The IRS closed the case with no change ten weeks later. Ignored, it would have become a CP3219A, and only a Tax Court petition could have stopped the assessment.
The fix for next year was the W-9. A disregarded single-member LLC reports under its owner's name and number, but an S corporation reports under its own EIN; a merchant account or client holding the wrong one produces a mismatch every January. Our 1099 filing guide covers the W-9 rules from the payer's side.
What usually goes wrong
Paying a CP2000 without checking it is the most common and most expensive mistake; the notice is a computer match, and the computer does not know that your 1099-K duplicated your K-1. Second is the drawer: a CP14 costs 0.5% a month plus interest, but an LT11 in the drawer costs you a bank account. Third is responding by phone only, with nothing to prove what was said when the next notice arrives.
On the payroll side, the recurring error is a CP2100 nobody acts on. B notices go out late or not at all, backup withholding never starts, and the IRS can hold the payer liable for the 24% it should have withheld. The 15-business-day clock in Publication 1281 is short.
When to get help
A CP14 for a balance you recognize, or a CP2000 for a 1099 you simply forgot, you can handle yourself with the steps above. Bring in a professional when the notice covers more than one year, the amount is large relative to your cash, payroll taxes are involved, or you have reached CP504 or LT11, because at that stage the deadlines carry legal consequences. For our tax planning and preparation clients, notice response is part of the engagement: we file the 2848, pull transcripts, draft the response and track the case until it closes. Our founder is a CPA and an enrolled agent, so representation is not handed off.
Most notices, though, are prevented rather than answered. Clean books, matching W-9s and estimated payments made on schedule remove the mismatches that generate them, which is the quiet benefit of monthly bookkeeping and of keeping the records the IRS will ask for. If you have a notice in hand, request a 20-minute fit call with it in front of you; the number in the corner tells us most of what we need to know.
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Request a 20-Minute Fit Call → Business Tax Planning & Preparation →Frequently asked questions
Is a CP2000 an audit?
No. It is an automated proposal generated when income reported to the IRS by a third party does not match your return. You are not being examined, and most CP2000s are resolved by mail with a response form and supporting documents. It becomes a legal matter only if you ignore it and a CP3219A Notice of Deficiency follows.
How do I know if an IRS letter is a scam?
Look for a notice or letter number, a tax year, and a phone number that matches irs.gov, and check whether the balance appears in your IRS online account. Threats of arrest, demands for gift cards or wire transfers, and 48-hour deadlines are scam signals. The IRS does not text or contact you on social media.
Can an enrolled agent represent my business before the IRS?
Yes. Enrolled agents are licensed by the Treasury Department with unlimited practice rights, so they can represent any taxpayer on any matter before the IRS, including examinations, collections and appeals. You authorize them with Form 2848, Power of Attorney.
What if I already paid and still got a CP14?
Pull your bank record of the payment and your IRS account transcript. Payments applied to the wrong year or the wrong entity are common, especially when an owner pays a business balance from a personal account. Send proof of payment with your response and ask the IRS to reapply it; the balance is usually corrected without penalty.
Does first-time penalty abatement work for Form 941 penalties?
Yes, for failure-to-file, failure-to-pay and failure-to-deposit penalties, as long as the prior twelve quarters had no penalties (or they were abated for cause), all required returns are filed, and the tax is paid or on a payment plan. The IRS does not grant it if the deposit penalty was waived four or more times in the prior three years.
Founder of Balance Partners. Florida-licensed CPA and IRS Enrolled Agent with more than a decade of accounting and tax experience. Jenny writes and reviews every guide on this site. About Jenny
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This article is general educational information for U.S. business owners and is not accounting, tax, legal, payroll or financial advice for your situation. Rules change and vary by entity, state and facts. Balance Partners, LLC does not provide audit, review or other attest services. Last reviewed September 14, 2026.