How to Respond to an IRS Notice: Step-by-Step Guide 2026

By Jennifer Walsh, EA, JD — IRS Correspondence & Appeals Specialist  |  Updated April 2026  |  13 min read
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Jennifer Walsh, EA, JD — IRS Correspondence & Appeals Specialist

Jennifer is an Enrolled Agent and attorney specialising in IRS notice response, audit representation, and tax appeals. With 16 years of experience, she has resolved thousands of IRS correspondence cases including CP2000 notices, examination reports, collection notices, and appeals. She is a member of the National Association of Enrolled Agents and frequently lectures on taxpayer rights.

Evidence Grade: A — Based on IRS Publications and current IRC provisions
$4.8B
In additional taxes proposed by IRS CP2000 notices annually
90 days
Deadline to respond to most IRS examination reports
30 days
Deadline to file Tax Court petition after final notice of deficiency

Receiving a letter from the IRS is stressful — but it is almost never as bad as it seems. The vast majority of IRS notices are routine requests for information or proposed adjustments that can be resolved without ever speaking to an IRS agent. The key is knowing what the notice means, responding correctly, and meeting the deadline. This guide explains the most common IRS notices and exactly how to respond.

Disclaimer: This article is for general informational purposes only and does not constitute tax advice. Consult a qualified tax professional for advice specific to your situation.
IRS Notice / LetterWhat It MeansResponse RequiredDeadline
CP2000IRS proposes changes based on mismatched information returnsAgree, disagree, or partial agreement with documentation60 days (listed on notice)
CP3219A (Statutory Notice of Deficiency)IRS has determined you owe additional tax — last chance before Tax CourtFile Tax Court petition or pay and seek refund90 days (150 days if abroad)
LT11 / Letter 1058Final notice of intent to levyRequest a Collection Due Process hearing immediately30 days
CP503 / CP504Balance due reminder / urgent balance noticePay, request payment plan, or disputeAs soon as possible
Letter 531Examination report proposing changesAgree, disagree, or request Appeals conference30 days (extendable)
Letter 3174Notice of federal tax lien filingPay, establish payment plan, or request lien withdrawalPromptly
"The three most common mistakes I see taxpayers make with IRS notices are: ignoring the notice and hoping it goes away, agreeing to proposed changes they should dispute, and responding without getting professional representation. Of these, ignoring a notice is by far the most dangerous — what starts as a proposed adjustment can escalate to a levy on your wages or bank account within months." — Jennifer Walsh, EA, JD

Action Checklist

Disclaimer: This article is for general informational purposes only. Tax rules change frequently. Consult a qualified tax professional for personalised advice.