IRS Letters: What Each Notice Means — CP14, CP2000, CP504, LT11 and More
A reference catalog of common IRS notices: what each code means, how urgent it is, and what to do first. We break down CP14, CP2000, CP504, LT11/Letter 1058, Letter 3219, and ITIN letters — with real response deadlines.
An envelope from the IRS arrives — and your stomach drops. The good news: every letter has a code in the top-right corner (CP14, CP2000, LT11…), and that code lets you figure out in a minute what's happening and how much time you have. This article is a reference catalog: what a specific notice means, how urgent it is, and where to start.
If what you need isn't a "letter decoder" but a step-by-step order of actions, that's in a separate breakdown: What to do when an IRS letter arrives — step by step. Here, the focus is on what exactly the paper in your hands means.
First, check: is this really the IRS, or a scam?
Before you panic, make sure the letter is genuine. Scammers actively pressure Russian-speaking immigrants, and they're easy to spot by a few signs.
The real IRS:
Any letter can be verified: on IRS.gov there's an "Understanding Your Notice" section by number, and amounts and status are visible in your IRS Online Account and in your transcript — how to read it is covered here: How to read an IRS transcript.
Quick reference: notice table
| Notice | What it means | Urgency | First step |
|---|---|---|---|
| CP14 | First bill: you have a balance due | Medium | Check the amount, pay or request an installment plan |
| CP501 / CP503 | Reminders about the same unpaid balance | Medium → higher | Don't ignore; respond before the date in the letter |
| CP504 | Notice of Intent to Levy: intent to seize your state tax refund | High | Pay off/arrange terms before the deadline |
| CP2000 | Underreporter: a proposal to assess additional tax due to an income mismatch | High (~30 days) | Compare with your documents, agree or dispute on time |
| CP2501 | Early stage of the same mismatch | High | Respond before the date, attach explanations |
| CP11 / CP12 | Math correction to the return: additional payment (CP11) or a changed refund (CP12) | Medium (~60 days to dispute) | Check the recalculation; if you disagree, get in touch |
| CP49 | Your refund was applied to another tax debt | Info / medium | Check which year and whether it's correct |
| CP53 | Your refund will come as a paper check, not to your account | Low (info) | Wait for the check, verify the address |
| LT11 / Letter 1058 | Final Notice of Intent to Levy + right to a hearing | Critical (30 days) | Form 12153 for a CDP hearing before the deadline |
| CP90 / CP297 | Final Notice of Intent to Levy (including for businesses) | Critical (30 days) | Same: CDP hearing on time |
| Letter 3219 | Statutory Notice of Deficiency — the "90-day letter" | Critical (90 days) | Petition to the US Tax Court before the deadline |
| CP565 | ITIN assigned | Low (info) | Keep the letter with your ITIN number |
| CP566 / CP567 | Issues with the ITIN application: information needed / denial | Medium | Provide documents or reapply |
Below, more detail by group.
Bills and reminders: CP14, CP501, CP503
CP14 is the first official bill. The IRS is telling you that, per your return, you have a balance due: the tax itself plus, possibly, interest and penalties. There's nothing catastrophic about it, but it's not junk mail — you need to respond by the date shown in the letter (usually around 21 days), or interest will keep accruing.
CP501 and CP503 are reminders about that same unpaid balance. CP501 is the first; CP503 is a more insistent second. On their own they don't yet mean your account will be frozen, but they're a signal that the silence has already dragged on and the IRS is moving toward tougher measures. If you can't pay the whole amount at once, that's a normal situation: there's an installment agreement and other options, covered below and in the breakdown IRS problems: installment agreements and OIC.
Income mismatch: CP2000 and CP2501
CP2000 scares people the most, and almost always for nothing — it's not an audit and not a final bill. It's a *proposal* (proposed changes): the IRS computer compared your return with data from employers and banks (W-2, 1099) and found a mismatch — for example, some 1099 didn't make it onto the return. The IRS proposes to recalculate the tax and shows how much, in its opinion, you owe.
The key point: you can disagree with this proposal. You have a deadline (usually 30 days from the date of the letter) to respond — either agree and pay, or dispute, attaching documents that explain the numbers. Sometimes the IRS didn't account for your expenses or counted one item of income twice. The main thing is to respond on time, not miss the deadline.
CP2501 is an earlier stage of the same process: the IRS notifies you of a mismatch even before it sends specific amounts in a CP2000. The logic is the same: compare with your documents and respond by the date in the letter.
Corrections and refunds: CP11, CP12, CP49, CP53
CP11 and CP12 are a math correction of your return (math error). The IRS itself recalculated something in the figures. CP11 usually means that after the correction you owe more; CP12 means the refund amount changed (up or down). If you disagree with the recalculation, you generally have 60 days to contact the IRS and dispute it — after that, the correction is harder to reverse.
CP49 tells you the IRS applied your refund (or part of it) to another tax debt — from a prior year or for a different tax. It's worth checking exactly which period it was applied to and whether the amount is correct.
CP53 is the most harmless of this group: the IRS couldn't send your refund to a bank account and will send a paper check. No action is usually required, other than making sure the IRS has the correct mailing address and waiting for the check.
Collection — here the deadlines are critical: CP504, LT11 / Letter 1058, CP90 / CP297
This is the most serious group. The deadlines here are real, and you can't miss them.
CP504 — Notice of Intent to Levy. The IRS warns that it intends to seize your state tax refund toward the federal debt and begins looking for other assets. It's a serious signal, but an important detail: CP504 by itself does *not* yet grant the right to a hearing — that right appears with the "final" notice below.
LT11 (the same as Letter 1058) is the Final Notice of Intent to Levy and Notice of Your Right to a Hearing. Now the IRS is ready to place a levy on wages, bank accounts, and other property. But at the same time, the letter gives you an important right: within 30 days, to request a Collection Due Process (CDP) hearing by filing Form 12153. As long as the request is filed on time, collection is generally paused, and you get the chance to discuss an installment plan or other alternatives. Missing those 30 days means losing the most convenient lever of defense.
CP90 and CP297 are also a Final Notice of Intent to Levy with the right to a hearing (CP297 is for businesses). The logic is the same: 30 days for a CDP hearing via Form 12153.
For the alternatives to collection — an installment agreement, "currently not collectible" status, an Offer in Compromise — details here: IRS problems: installment agreements and OIC.
The "90-day letter": Letter 3219 (Statutory Notice of Deficiency)
Letter 3219, also known as the Statutory Notice of Deficiency, is a special letter that tax people call the "90-day letter." It means the IRS has officially determined a deficiency and is going to assess it. But before that, the law gives you 90 days (150 if you're outside the US) to file a petition with the US Tax Court — this is the only way to dispute the amount in court *before* paying it.
The deadline here is ironclad: it can't be extended, and missing it means the tax will simply be assessed, after which disputing it becomes much harder and, as a rule, only through paying and then seeking a refund. If you received a Letter 3219 — this is not a "deal with it later" letter.
ITIN letters: CP565, CP566, CP567
A separate line is ITIN applications (via Form W-7).
Getting an ITIN is exactly the kind of thing I help with directly: gathering and correctly filing the W-7 to avoid a CP566/CP567.
Three rules that matter more than the letter number
Whatever notice arrives, three general principles apply.
In brief
What's next
If a letter has already arrived, I'll help you break down your specific notice, understand what it means in your situation, and prepare a correct response and documents on time — and if formal representation before the IRS is needed, we'll bring in an authorized EA, CPA, or attorney. Leave a request or book a review at **fintaxes.us**.
*This material is educational and is not individual tax or legal advice. For the specific deadlines and amounts, see your notice and IRS.gov; for a decision about your situation, consult a professional.*
