A free step-by-step guide from Deanna R. Ngueket, CPA, LLC, for taxpayers in Atascocita, Spring, and Humble
If you just opened your mailbox and found an envelope from the IRS, take a breath. I know that sinking feeling. A letter from the IRS is stressful, even when it turns out to be routine. But here’s what I want you to know before you read another word: most IRS notices are routine, most are fixable, and almost none of them require you to panic.
I’m Deanna Ngueket, a CPA licensed in the state of Texas, and I built my practice around helping 1099 professionals, small business owners, real estate professionals, and trucking companies here in Atascocita, Spring, and Humble deal with exactly this kind of letter. This guide walks you through the notices you’re most likely to see, how to tell a routine one from a serious one, what to do the moment it lands in your hands, and when it’s time to bring in a CPA instead of handling it alone. Where I describe what a notice means, I link to the IRS’s own explanation so you can read it straight from the source.
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The Most Common IRS Notices You’ll See
The IRS sends dozens of different notice types, but a handful show up far more often than the rest.
CP2000 – Underreporter Notice. This isn’t a bill or an audit. It means the income reported on your return doesn’t match what the IRS received from employers, clients, or financial institutions — often a missing 1099 for a side gig or freelance project. It proposes a change; it doesn’t finalize one. (IRS: Understanding your CP2000 series notice.)
CP14 – Balance Due Notice. This is the IRS’s way of saying, “You filed a return, and according to our records, you still owe us money.” It’s usually the first notice in a collection sequence, and it comes with a real deadline. (IRS: Understanding your CP14 notice.)
CP504 – Intent to Levy (Final Notice Territory). This is a step up in seriousness. It tells you the IRS intends to seize state tax refunds and can move toward levying other assets if the balance goes unresolved. The notice is issued under Internal Revenue Code section 6331(d). (IRS: Understanding your CP504 notice.)
Letter 525 and Letter 3219 (Audit Changes and the Notice of Deficiency). Letter 525 comes out of an examination of your return and proposes changes to your income or deductions, generally giving you 30 days to agree or respond. Letter 3219 is the Notice of Deficiency — often called the “90-day letter.” It is the IRS’s formal legal notice of the tax it proposes to assess, and it gives you 90 days to petition the U.S. Tax Court if you disagree (150 days if the notice is addressed to you outside the United States). That deadline comes from Internal Revenue Code sections 6212 and 6213(a), and the IRS cannot extend it. (IRS Taxpayer Advocate Service: Letter 525 and Letter 3219.)
CP2100 or backup withholding notices — more common if you issue 1099s to contractors — flag mismatched taxpayer ID numbers on the forms you filed. (IRS: Understanding your CP2100 or CP2100A notice.)
Simple math-error or refund adjustment notices are usually the least concerning of all: the IRS corrected a calculation and adjusted your refund or balance accordingly. The IRS’s authority to make these corrections without a formal deficiency notice is in Internal Revenue Code section 6213(b), which also gives you 60 days to request that the correction be reversed.
Routine vs. Serious: How to Tell the Difference
Here’s the rule of thumb I give my clients: a notice is generally routine if it explains a small adjustment, requests information, or simply confirms something already agreed upon — think math corrections, confirmation of a payment plan, or an identity verification request.
A notice moves into serious territory when it involves a proposed or existing balance due of any real size, mentions a lien or levy, sets a hard deadline with legal consequences, or opens an audit or examination. If the letter uses words like “intent to levy,” “final notice,” “examination,” or “Notice of Deficiency,” treat it as time-sensitive and don’t sit on it.
What To Do the Moment You Get One
- Don’t ignore it. IRS notices don’t go away, and the deadlines inside them are real. Ignoring a CP14 is how it becomes a CP504. The IRS lays out that sequence in Publication 594, The IRS Collection Process.
- Open it and read the whole thing. Note the notice number (top right corner), the tax year it references, and the response deadline.
- Verify it’s actually from the IRS. The IRS contacts taxpayers by mail for these matters — not by text message, email, or a phone call demanding immediate payment. If something feels off, you can verify a notice by calling the IRS directly using the number on irs.gov, not a number printed in a suspicious message. (IRS: How to know it’s really the IRS calling or knocking on your door.)
- Compare it to your own return. Pull the return for that tax year and check the numbers the notice references against what you actually filed.
- Keep everything. Make a copy of the notice and any documents you gather in response. Never send originals.
- Note the deadline and respond on time, even if your response is simply, “I need more time” or “I disagree, here’s why.”
When You Can Handle It Yourself vs. When To Call a CPA
Some notices really are simple enough to handle on your own. A straightforward math-error notice, a request to confirm your address or identity, or a small, clearly correct adjustment often just needs a quick written response or none at all.
I’d tell you to call a CPA — before you respond, not after — when any of the following apply: the notice proposes a balance you don’t recognize or don’t understand, it references self-employment or 1099 income where the numbers seem wrong, it involves more than one tax year, it mentions a lien, levy, or wage garnishment, or it’s an audit notice of any kind. I’d also tell you to call if you’re simply not sure what the letter is asking for. A ten-minute conversation up front can prevent a much more expensive mistake down the line, especially once a response deadline has already passed.
This is especially common for 1099 contractors, real estate professionals and trucking businesses, where income often comes from multiple sources and mismatched 1099s are one of the most common reasons a CP2000 shows up in the first place.
How IRS Representation Actually Works
When you hire a CPA to represent you before the IRS, here’s what actually happens. I file a Power of Attorney (IRS Form 2848), which authorizes me to speak with the IRS directly on your behalf, request your account transcripts, and respond to notices without you having to get on the phone yourself.
From there, representation can mean a few different things depending on the notice: drafting a written response with supporting documentation to dispute or explain a proposed change, negotiating a monthly payment plan or an Offer in Compromise if you owe more than you can pay at once, requesting penalty relief when you qualify, or representing you through a full audit from start to finish. In every case, the goal is the same — resolve the matter accurately, protect you from unnecessary penalties, and keep the IRS from becoming a bigger problem than it needs to be.
Don’t Face It Alone
An IRS notice is not a verdict — it’s a starting point, and how you respond matters more than the fact that you received one. If a letter just showed up in your mailbox and you’re not sure what to do next, I’d rather you call me before you respond than after.
I work with 1099 professionals, small business owners, real estate professionals, and trucking companies throughout Atascocita, Spring, and Humble, and I offer a straightforward first conversation to look at your notice and tell you plainly what it means and what I’d do about it. You can read more about how I handle notices on my IRS Notice Resolution page.
Call me at (713) 730-9792 or visit deannacpa.com to reach out. Keep more of what you earn — wherever you work, and whatever shows up in your mailbox.
— Deanna R. Ngueket, CPA
Deanna R. Ngueket, CPA, LLC | Licensed in the State of Texas
Primary sources
- Internal Revenue Code §6212 (notice of deficiency), §6213 (90-day Tax Court petition; math-error corrections), and §6331 (levy and notice of intent to levy)
- IRS notice explanations: CP2000, CP14, CP504, CP2100/CP2100A, Letter 525, Letter 3219
- IRS Publication 594, The IRS Collection Process
- IRS Form 2848, Power of Attorney and Declaration of Representative
- IRS guidance on payment plans, Offers in Compromise, penalty relief, and verifying IRS contact
This guide is general information, not tax advice for your specific situation. Every notice depends on the facts of your return.

