US Tax Professional Complete Roadmap — CPA, Enrolled Agent, and Tax Credential Pathways

What Is a US Tax Professional?

The US tax credential landscape offers two major practitioner designations:

Enrolled Agent (EA): The IRS-issued credential that grants the highest level of representation rights before the IRS. EAs can represent any taxpayer, for any tax matter, before any IRS office — without court access.

CPA (Tax Track): CPAs who specialize in tax also prepare returns, advise on planning, and represent clients in IRS matters. Their credential is state-issued and broader than tax alone.

Governing body: IRS (EA) / AICPA and state boards (CPA)
Annual EA exams: Approximately 20,000–30,000 candidates per year
Exclusive work: Both EAs and CPAs can represent taxpayers before the IRS. Only CPAs (and attorneys) can sign audit reports.

US tax professionals serve businesses and individuals in tax return preparation, audit defense, tax planning, and compliance — the closest US equivalent to the Korean tax accountant (세무사) role.

Eligibility Requirements

Enrolled Agent (EA)

No degree required. No experience required. Anyone can sit the Special Enrollment Exam (SEE) after obtaining an IRS PTIN (Preparer Tax Identification Number).

Disqualifying factors:

Federal tax violations or criminal convictions related to tax
Prior EA suspension or disbarment
Failure to file personal tax returns

Alternative path to EA: Individuals with 5+ years of IRS employment in positions involving tax interpretation and enforcement may apply for EA status without taking the exam.

CPA (Tax Specialization)

Requires 150 semester hours of college education
Must pass the 4-section CPA exam (see CPA roadmap)
State license required
For detailed CPA requirements, see the CPA Complete Roadmap

Exam Structure

Special Enrollment Exam (SEE) — EA Exam

The EA exam consists of three parts, administered by Prometric testing centers:

Part	Topics	Questions	Duration
Part 1	Individuals	100 questions	3.5 hours
Part 2	Businesses	100 questions	3.5 hours
Part 3	Representation, Practices & Procedures	100 questions	3.5 hours

Passing score: 105 on a 40–130 scaled score (approximately 70% correct)
Window: Each part is valid for 2 years — all 3 must be passed within a rolling 3-year window
Testing period: May 1 – February 28 (excluding March–April blackout period during tax season)

Candidates may take the parts in any order. Most practitioners recommend Part 1 → Part 2 → Part 3.

CPA (REG Section — Tax Component)

For CPAs specializing in tax, the REG (Regulation) section covers:

Federal individual and business taxation
Tax procedure and ethics
Business law

Passing REG is part of passing all four CPA sections. See the CPA roadmap for full details.

Subject Areas and Study Strategy

Federal Individual Income Tax (EA Part 1)

The foundation of US tax practice. Key topics:

Filing status and gross income:

Filing statuses: single, MFJ, MFS, HOH, qualifying widow(er)
Income inclusions: wages, interest, dividends, business income, rents, royalties
Exclusions: gifts, inheritances, certain employer benefits

Adjustments, deductions, and credits:

Above-the-line deductions (IRA contributions, student loan interest, alimony pre-TCJA)
Standard deduction vs. itemized deductions (SALT cap, mortgage interest, charitable)
Child Tax Credit, Earned Income Credit (EITC), education credits
Alternative Minimum Tax (AMT) basics

Capital gains and losses:

Short-term vs. long-term capital gains
§1231 gains (real property used in business)
Net investment income tax (NIIT) — 3.8% surcharge

Retirement accounts:

Traditional IRA, Roth IRA, 401(k), SEP-IRA, SIMPLE IRA
Contribution limits, required minimum distributions (RMDs), early withdrawal penalties

Study strategy:

Work through practice problems for each income and deduction category
Tax law changes under TCJA (2017) and subsequent legislation are heavily tested
Use an updated prep course (Gleim, Fast Forward Academy, Surgent EA Review)

Federal Business Tax (EA Part 2)

Business entity taxation is the most complex and highest-value area of US tax practice:

C Corporations:

Corporate taxable income calculation
Dividends-received deduction (DRD)
Accumulated earnings tax, personal holding company tax
Corporate AMT (new under CAMT post-2022)

S Corporations:

Eligibility requirements (100 shareholders max, one class of stock, US citizens/residents only)
Pass-through income/loss treatment
Basis tracking — stock basis and debt basis
Built-in gains tax (BIG) for S corp conversions

Partnerships and LLCs:

Partnership formation and contribution rules
Distributive shares and the Schedule K-1
Partnership basis (outside basis and inside basis)
§754 election and §743 adjustments

Self-Employment and Sole Proprietorships:

Schedule C and self-employment tax (15.3%)
Qualified business income (QBI) deduction (§199A) — a complex and frequently tested area

Employment taxes:

FICA (Social Security and Medicare) obligations
FUTA (Federal Unemployment Tax Act)
Payroll tax penalties (§6672 — Trust Fund Recovery Penalty)

Estate and gift tax:

Annual gift tax exclusion ($18,000 for 2024)
Unified credit / lifetime exemption
Basis rules (step-up at death under §1014)

Representation, Practices, and Procedures (EA Part 3)

This part tests the practitioner’s knowledge of IRS procedures and Circular 230 ethics:

Circular 230 (31 C.F.R. Part 10):

Standards for preparing returns and giving tax advice
Competency requirements
Duties regarding client errors and confidentiality
Sanctions: reprimand, suspension, disbarment from practice before IRS

IRS procedures:

Examination (audit) types: correspondence, office, field
Taxpayer rights (Taxpayer Bill of Rights)
Appeals process: 30-day letter, 90-day letter, Tax Court petition
Collections: liens, levies, installment agreements, offers in compromise (OIC), currently not collectible (CNC) status
Penalty abatement procedures

Tax preparer penalties:

§6694 (understatement of taxpayer liability)
§6695 (failure to furnish copy of return, failure to sign, etc.)
§6713 (disclosure or use of tax return information)

Pass Rates and Exam Statistics

EA Exam Part	Pass Rate
Part 1 (Individuals)	~70–75%
Part 2 (Businesses)	~60–65%
Part 3 (Representation)	~75–80%

Part 2 (Businesses) is consistently the most difficult, due to the complexity of pass-through entity taxation and basis calculations.

Total study time: Most candidates spend 100–150 hours per part (300–450 hours total).

Study Timeline by Background

Non-Accounting Background

1.5–2.5 years is realistic for all three EA parts.

Year 1: Complete Part 1 (Individuals) and Part 2 (Businesses) with structured study
Year 2: Complete Part 3 (Representation) and apply for EA status
Simultaneously: Begin working in a tax prep setting to apply knowledge

Accounting / Finance Background

8–18 months is achievable.

Tax or accounting work experience accelerates Part 1 and Part 2 comprehension
Part 2 business entity content benefits from prior accounting coursework (partnerships, corporate tax)

Working Tax Preparers (Parallel Study)

Daily work in tax preparation firms (H&R Block, Jackson Hewitt, independent CPA firms) provides direct reinforcement. Many preparers sit each EA exam part during the exam season immediately following each tax filing season.

Recommended approach: Study one part per quarter, sitting exams between May and February.

Career Paths After Certification

Tax Practice (Public Accounting)

The most common path. EA-credentialed preparers can advance to senior preparer, reviewer, and manager roles at:

National tax chains (H&R Block, Jackson Hewitt)
Local and regional CPA firms
Independent EA practices (sole proprietor or small firm)

Corporate Tax Department

Large companies employ tax professionals in internal tax departments to manage:

Federal and state income tax compliance (Forms 1120, 1120S, 1065)
Tax provision (ASC 740) under US GAAP
International tax (transfer pricing, GILTI, FDII, BEAT for multinationals)
Tax planning and M&A due diligence

Feature	Enrolled Agent (EA)	CPA (Tax Track)
Granting body	IRS (federal)	State board of accountancy
Degree required	No	Yes (150 hours)
Exam	3-part SEE	4-part CPA exam (much broader)
Audit rights	Before IRS only	Before IRS + can sign audit opinions
Practice scope	Tax and IRS matters	Tax + audit + advisory
Typical prep time	6–18 months	2–4 years
Cost to obtain	~ $500–$ 1,500	~ $3,000–$ 10,000

Tax specialization without audit: the EA is the most direct, accessible route. Broad accounting career including audit: the CPA is essential.

Tax Law Fundamentals: Individual income, business taxation, and IRS procedures — the complete framework for EA exam preparation
Economics Fundamentals: Theoretical basis for understanding fiscal policy (relevant to CPA and advanced tax planning)

Study Checklist

I have obtained an IRS PTIN (required before scheduling the EA exam)
I have reviewed all three EA exam parts and allocated study time accordingly
I understand the key entity types (C corp, S corp, partnership) and their tax treatment
I have reviewed Circular 230 and know the practitioner ethical requirements
I have a plan for the exam testing window (May 1 – February 28) and part sequencing
I understand the IRS audit and collections process (Part 3 emphasis)