Guide
Most IRS letters come from a short list of causes: income that doesn't match, payments that came up short, simple errors and an out-of-date address. Each one is preventable.
The IRS sends notices when you have a balance due, when your refund changes, when it has a question about your return, or when it needs to verify your identity. Many of those letters are triggered by automated checks, not by a person picking your return out of a pile.
That's good news, because automated checks are predictable. The habits below target the most common triggers. If a letter has already arrived, skip to our guide on what to do with an IRS notice instead.
The IRS compares the income on your return with the W-2s, 1099s and other information returns that employers, banks and platforms send it. When the numbers don't match, it can send a CP2000 notice proposing changes to your tax. Filing before a late 1099 or a corrected form shows up is one of the easiest ways to trigger one.
Gig work, freelance jobs, bank interest, brokerage sales and payment-app income all get reported by the payer. If a form was sent to the IRS, assume the IRS will look for it on your return. Keep a running list of every payer during the year so nothing is forgotten in spring. Our post on 1099 vs W-2 income explains how each is taxed.
A balance you can't pay at filing time is how many collection notices start. The IRS Tax Withholding Estimator lets you check whether your paycheck withholding matches your likely tax, and you can adjust with a new W-4. Do it after any job change, marriage, new child or second income. Our W-4 withholding calculator gives a quick first look.
No employer withholds tax on self-employment, rental or investment income, so the IRS expects estimated payments during the year. Missing them can mean an underpayment penalty and a balance-due notice. The quarterly estimated taxes guide and the quarterly tax calculator show how to size each payment.
Filing late brings its own penalty, and an extension only gives you more time to file. The IRS is clear that an extension of time to file is not an extension of time to pay. Estimate what you owe and pay it by the regular due date, even if the return comes later. Our South Carolina tax deadlines post lists the dates.
A misspelled name, a transposed Social Security number or a dependent claimed by two people can hold up a return and bring a letter asking for proof. Match every name and number against the Social Security card, and agree with a former spouse in advance about who claims each child. E-filing through tax software or a preparer also catches many math errors before the return is sent.
The IRS mails notices to the address it has on file for you. If you move, file Form 8822 or use the other methods the IRS lists in Topic 157 so letters don't sit at an old address while deadlines pass. Businesses use Form 8822-B.
If the IRS questions a deduction or credit, your records are the answer. Without them, an audit letter can turn into a bill. Keep receipts, mileage logs, and home office and vehicle records with each year's return. Our list of IRS audit red flags covers the items the IRS looks at most closely.
Identity theft can generate letters you had nothing to do with. The IRS Identity Protection PIN is a six-digit number that prevents anyone else from filing a return with your Social Security number. Anyone with an SSN or ITIN who can verify their identity can get one through their IRS online account.
Your online account shows balances, payments the IRS has received and transcripts of what payers reported. A quick look before you file, and again after, can reveal a missing payment or an unexpected form early. It is also the safest place to confirm a notice is real: the IRS doesn't start contact by email, text or social media.
Even careful filers get letters. Read it the day it arrives, find the CP or LTR number printed in the corner, and note the response date. If you agree, follow the instructions. If you don't, respond by the deadline with documents that support your position, which preserves your appeal rights. Pay what you can by the due date to limit interest and penalties.
Elite Pro-Tax helps clients read notices and gather what the IRS asks for, and representation, when a matter needs it, is handled by the independent licensed CPA the firm partners with. The tax resolution page explains how that works.
Two you are likely to see are balance-due notices and the CP2000. The CP2000 is issued when income or payments reported by employers, banks or other payers don't match your return. It is not a bill but a proposal to adjust your return, and you can agree or send documents showing why the IRS figures are wrong.
The IRS doesn't initiate contact by email, text message or social media. A real notice has a CP or LTR number you can look up on IRS.gov, and many notices also appear in your IRS online account. If in doubt, call the IRS using the number on IRS.gov, not the number in a suspicious message.
An extension on its own doesn't cause a problem. The trouble starts when the tax isn't paid by the original due date, because an extension of time to file is not an extension of time to pay. Estimate your tax and pay it with the extension to avoid a balance-due letter later.
It reduces the math and form errors that cause many letters, but it can't fix missing information you didn't provide. Give your preparer every W-2 and 1099, and tell them about side income and estimated payments. Our tax appointment checklist helps you bring everything the first time.
Not the question you had? The full tax FAQ covers more ground, and our client reviews say what the work is actually like.
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Learn moreIRS notices, back taxes, unfiled returns, audits and payment arrangements.
Learn moreYear-round strategy so the return in April reflects decisions made all year.
Learn moreMost IRS letters are not audits. The ones that are have deadlines, and how you respond in the first two weeks shapes everything after.
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