IRS Letter Decoder

Start here: what this tool does (and what it doesn’t)

TaxCairn is a free matching and information service—not a law firm, tax-prep company, or government agency. This tool is here to help you understand your IRS letter so you can speak clearly with a qualified professional.

The IRS sends different notices for different reasons (missing returns, balances due, identity or filing issues, audits, and more). Knowing the “type” of notice can reduce stress and help you ask better questions.

This tool does not provide legal advice, does not guarantee outcomes, and cannot promise the IRS will approve a specific plan. Rules can vary by case and by state tax rules for state issues.

You also do not need to share SSN, ITIN, tax returns, or financial account information to use it. If you decide you want help, we can help you get matched to a professional who can review your letter details.

How to decode your IRS letter in a few steps

1) Find the letter number (often shown as CP, LT, or a notice number like “Letter 5000” or “CP___”).

2) Look for the tax year and what the IRS says you should do (for example: “pay now,” “file missing returns,” “respond,” or “schedule an appointment”).

3) Note the deadline date and any instructions about how to respond.

Then use the decoder to identify the letter type and get a plain-language summary of what it usually means and what typical next steps look like. If you prefer, you can often read in your language—so you can understand the key points before you contact a professional.

Common IRS letter meanings (plain language)

Here are a few examples of what IRS letters often fall under. Your specific letter may include more details, but this can help you understand the overall category.

• Missing or unfiled tax return: The IRS may say your return for a tax year is not on file. This is separate from immigration status—many people file with an ITIN or other tax documentation.

• Balance due / payment required: The letter may list amounts the IRS believes you owe. “Owe” can include tax, penalties, and interest that grow over time.

• Request for information or an explanation: The IRS may ask you to confirm or correct information. This often has response steps, so it’s important to read carefully.

• Audit or examination: Some letters relate to a review of reported items. If you’re facing an audit, it’s normal to want a second opinion from a tax-resolution professional.

If you’re not sure where your letter fits, start with the letter type and deadline. The decoder is designed to help you identify the right category first.

Before you contact a professional: organize the key facts

When you talk to an attorney or other tax-resolution professional, the most useful info is usually the letter type, tax year, and what the IRS is requesting. The goal is to help them understand the situation quickly so you can discuss options.

Write down (or keep a note of) these items:

• Letter number/type (CP, LT, or notice number)

• Tax year(s) mentioned

• Deadline date(s) and response instructions

• What the IRS says you must do (pay, file, respond, or provide information)

If you’re facing stress like wage garnishment, a bank levy, or a lien, the letter may be part of that process. “Lien” generally means a legal claim on property. “Levy” generally means the IRS actually takes money or property. If you see those terms, it’s especially important to talk to a professional promptly.

Questions to ask (so you get clear answers, not vague promises)

It’s normal to wonder, “Can the IRS take my paycheck?” or “What if I can’t pay?” Use these questions to guide your conversation.

• “What does this specific letter usually mean, and what is the IRS asking for?”

• “What are my options to resolve the tax debt—like installment payments, penalty relief, or other approaches?”

• “Is there a deadline I must meet, and what happens if I miss it?”

• “Do I need to file missing returns first, or can we address the debt another way?”

Be cautious with anyone who guarantees a result or promises a fixed settlement. Each case is different, and professional help often includes reviewing your documents and tax history.

If you want help finding the right person, you can explore services or start matching at get-matched.

What help may cost (estimate only) and how matching works

Cost varies a lot based on your state, the complexity of your tax issue, how many years are involved, and what the IRS is requesting. For many tax-debt cases, professional help can be roughly $1,500–$5,000 flat fee, with higher costs for complex situations.

If you’re looking at payment plans, IRS installment agreements may start around $25/month depending on what’s owed and eligibility. An Offer in Compromise (an application to settle for less in certain cases) can involve a few hundred dollars, sometimes with possible fee waivers depending on circumstances.

TaxCairn is free to use. Participating professionals pay a flat fee for matching. We do not take a percentage of fees or money recovered. You can use the decoder first, then choose whether to contact a professional.

Learn more at guides and use the decoder to get organized before your call.