Part 3 · Practices & Procedures

Notice of Deficiency: Notice of Deficiency & Tax Court

Notice of Deficiency: Notice of Deficiency & Tax Court is a critical concept in EA Exam Part 3, Practices & Procedures. This topic covers essential tax principles that frequently appear on the exam. Understanding notice of deficiency & tax court is crucial for passing Part 3.

Notice of Deficiency & Tax Court: EA Exam Part 3 at a glance, what is tested and the IRS references

Quick answer

The statutory notice of deficiency (the "90-day letter") is the taxpayer’s ticket to Tax Court. Part 3 tests the 90-day period to petition the Tax Court without first paying the tax, and what happens if the taxpayer does not respond.

Notice of Deficiency & Tax Court is tested on EA Exam Part 3 (Practices & Procedures). Primary IRS reference: IRC §6212.

About this EA exam topic

The statutory notice of deficiency (the "90-day letter") is the taxpayer’s ticket to Tax Court. Part 3 tests the 90-day period to petition the Tax Court without first paying the tax, and what happens if the taxpayer does not respond.

Expect questions distinguishing the 30-day letter (Appeals) from the 90-day letter (Tax Court) and the consequences of missing the deadline.

What you'll be tested on

  • The 90-day period to petition the Tax Court
  • Difference between the 30-day and 90-day letters
  • Pay-first vs. petition-without-paying options
  • Consequences of not responding

How to prepare

  • Memorize 90 days (150 if addressed outside the U.S.).
  • Tax Court lets you litigate without paying first.
  • Distinguish 30-day (Appeals) from 90-day (deficiency) letters.

Practice questions for Notice of Deficiency & Tax Court

What this topic covers

Notice of Deficiency & Tax Court appears in Part 3: Representation, Practices & Procedures within the Practices & Procedures domain. VantageEA practice questions focus on how notice of deficiency rules are applied in realistic EA exam fact patterns.

What candidates practice

Candidates practice identifying tested facts, choosing the best multiple-choice answer, and reviewing explanations tied to IRC §6212, IRC §6213. This topic supports timed 100-question PSI-style mock tests and shorter topic review sessions.

Related practice-question themes include notice-of-deficiency, 90-day-letter, tax-court, petition.

Topic overview

Exam partPart 3: Representation, Practices & Procedures
DomainPractices & Procedures
TopicNotice of Deficiency
Difficultyeasy to medium to hard
Last updated2025-tax-year

Official IRS sources

Related keywords

notice-of-deficiency90-day-lettertax-courtpetition

Frequently asked questions

What is a notice of deficiency?

The 90-day letter that gives the taxpayer the right to petition the Tax Court before assessment, without prepaying the tax.

Which part?

Part 3 (Representation).

Reference?

IRS Publication 556.

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