2.1 Single & Married Filing Jointly

Enrolled Agent EA

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1 Part 1, Chapter 1: Tax Return Basics & Filing Requirements

1.1 Form 1040 Overview & Structure 1.2 Form 1040-SR for Seniors 1.3 Who Must File (Income Thresholds) 1.4 Filing Deadlines & Extensions (Form 4868) 1.5 Penalties: Failure to File vs. Failure to Pay 1.6 Sources of Tax Information (W-2s, 1099s, K-1s) 1.7 Preparer Due Diligence Requirements 1.8 Amended Returns (Form 1040-X)

2 Part 1, Chapter 2: Filing Status & Dependents

2.1 Single & Married Filing Jointly 2.2 Married Filing Separately 2.3 Head of Household Requirements 2.4 Qualifying Surviving Spouse 2.5 Qualifying Child Test (5 Tests) 2.6 Qualifying Relative Test (4 Tests) 2.7 SSN, ITIN & Residency Status

3 Part 1, Chapter 3: Wages & Employee Compensation

3.1 W-2 Income & Withholding 3.2 Employee vs. Independent Contractor 3.3 1099-NEC, 1099-MISC & 1099-K Reporting 3.4 Fringe Benefits (Taxable vs. Non-Taxable) 3.5 Stock Options (ISO vs. NQSO) 3.6 Special Categories (Clergy, Military, Foreign)

4 Part 1, Chapter 4: Interest, Dividends & Other Income

4.1 Taxable vs. Tax-Exempt Interest 4.2 US Savings Bonds & OID 4.3 Ordinary vs. Qualified Dividends 4.4 Schedule B Requirements 4.5 Rental & Royalty Income Basics 4.6 Alimony, Gambling & Other Income 4.7 Cancelled Debt & Form 1099-C 4.8 Net Operating Loss (NOL)

5 Part 1, Chapter 5: Capital Gains & Property Transactions

5.1 Capital vs. Non-Capital Assets 5.2 Cost Basis Calculation 5.3 Inherited & Gifted Property Basis 5.4 Short-Term vs. Long-Term Gains 5.5 Capital Gains Tax Rates (0%, 15%, 20%) 5.6 Netting & the $3,000 Loss Limit 5.7 Wash Sales & Related Party Rules 5.8 Sale of Primary Residence (Section 121) 5.9 Installment Sales (Form 6252) 5.10 Like-Kind Exchanges (Section 1031)

6 Part 1, Chapter 6: Adjustments to Income

6.1 Educator Expenses & HSA Contributions 6.2 Self-Employment Tax Deduction 6.3 IRA Contributions (Traditional) 6.4 Student Loan Interest Deduction 6.5 Alimony Paid (Pre-2019 Divorces) 6.6 Other Adjustments & New OBBBA Deductions (Tips, Overtime, Auto Loan, Senior Bonus)

7 Part 1, Chapter 7: Deductions (Standard & Itemized)

7.1 Standard Deduction by Filing Status 7.2 Medical & Dental Expenses (7.5% Floor) 7.3 State & Local Taxes (SALT $40K Cap) 7.4 Mortgage Interest Deduction 7.5 Charitable Contributions 7.6 Casualty & Theft Losses 7.7 QBI Deduction (Section 199A)

8 Part 1, Chapter 8: Tax Calculation & Credits

8.1 Tax Tables & Rate Schedules 8.2 Alternative Minimum Tax (AMT) 8.3 Self-Employment Tax Calculation 8.4 Child Tax Credit & Additional CTC 8.5 Earned Income Tax Credit (EITC) 8.6 Education Credits (AOC & LLC) 8.7 Child & Dependent Care Credit 8.8 Other Credits (Saver's, Premium Tax)

9 Part 1, Chapter 9: Retirement Accounts & Social Security

9.1 Traditional vs. Roth IRA 9.2 401(k), 403(b) & TSP Basics 9.3 SEP-IRA & SIMPLE IRA 9.4 Required Minimum Distributions (RMDs) 9.5 Early Withdrawal Penalties & Exceptions 9.6 Social Security Taxation

10 Part 1, Chapter 10: Specialized Individual Returns

10.1 Estate Tax (Form 706) 10.2 Gift Tax (Form 709) 10.3 Foreign Income (Form 2555) 10.4 FBAR & FATCA Reporting 10.5 Farm Income (Schedule F) 10.6 Disaster Area Rules

11 Part 2, Chapter 11: Business Entity Types

11.1 Overview of Entity Types 11.2 State Law vs. Tax Classification 11.3 Entity Selection: Reasonable Comp & QBI 11.4 Form 8832 & Rev. Proc. 2009-41 11.5 LLC Deep Dive: Spouses & EINs 11.6 Changing Status: The 60-Month Rule

12 Part 2, Chapter 12: Starting a Business

12.1 Hobby vs. Business (Profit Motive) 12.2 Employer Identification Number (EIN) 12.3 Tax Year Selection 12.4 Recordkeeping Requirements 12.5 Statute of Limitations 12.6 Related Party Transactions 12.7 Start-Up Costs, Entity Choice & OBBBA Business Changes (2025)

13 Part 2, Chapter 13: Worker Classification & Payroll

13.1 Employee vs. Independent Contractor 13.2 Common Law Test (Behavioral, Financial, Relationship) 13.3 Statutory Employees & Non-Employees 13.4 Form 941 & Payroll Deposits 13.5 Trust Fund Recovery Penalty 13.6 FUTA & Unemployment Taxes

14 Part 2, Chapter 14: Accounting Methods & Income

14.1 Cash vs. Accrual Method 14.2 Hybrid Methods & Changes 14.3 Inventory & COGS 14.4 Gross Receipts & Income Recognition 14.5 Constructive Receipt 14.6 Form 1099 Reporting Requirements 14.7 §163(j) Business Interest Expense Limitation 14.8 §174 Research & Experimental Expenditures

15 Part 2, Chapter 15: Depreciation & Asset Treatment

15.1 MACRS Basics & Recovery Periods 15.2 Mid-Month, Mid-Quarter, Half-Year Conventions 15.3 Section 179 Expense Deduction 15.4 Bonus Depreciation 15.5 Listed Property Rules 15.6 Amortization of Intangibles 15.7 Depletion 15.8 Disposition of Business Assets

16 Part 2, Chapter 16: Business Deductions

16.1 Ordinary & Necessary Test 16.2 Business Travel Expenses 16.3 Business Meals (50% Limitation) 16.4 Business Use of Vehicle 16.5 Home Office Deduction 16.6 Business Interest Limitation (163(j)) 16.7 Business Bad Debts

17 Part 2, Chapter 17: Business Credits & Fringe Benefits

17.1 General Business Credit Overview 17.2 R&D Credit & Disabled Access Credit 17.3 Small Employer Health Insurance Credit 17.4 Fringe Benefit Rules 17.5 Cafeteria Plans (Section 125) 17.6 Achievement Awards & Other Benefits

18 Part 2, Chapter 18: Sole Proprietorships

18.1 Schedule C Overview 18.2 Calculating Net Profit/Loss 18.3 Self-Employment Tax (Schedule SE) 18.4 Estimated Tax Payments 18.5 Hobby Loss Rules

19 Part 2, Chapter 19: Partnerships

19.1 Partnership Formation 19.2 Partner's Basis Calculation 19.3 Form 1065 Overview 19.4 Schedule K-1 (Partner's Share) 19.5 Guaranteed Payments 19.6 Partnership Distributions 19.7 At-Risk & Passive Activity Rules 19.8 Partnership Termination & Liquidation

20 Part 2, Chapter 20: C Corporations

20.1 Form 1120 Overview 20.2 Corporate Tax Rate (21%) & CAMT 20.3 Accumulated Earnings Tax 20.4 Dividends Received Deduction 20.5 Earnings & Profits (E&P) 20.6 Corporate Distributions, Dividends & Stock Redemptions 20.7 §351 Transfers, §1032, §1202 QSBS & Other Corporate Provisions 20.8 Corporate Liquidation

21 Part 2, Chapter 21: S Corporations

21.1 S Election Requirements (Form 2553) 21.2 Form 1120-S Overview 21.3 Shareholder Basis Calculation 21.4 Reasonable Compensation 21.5 S Corporation Distributions 21.6 Built-In Gains Tax & Termination

22 Part 2, Chapter 22: Specialized Business Returns

22.1 Trusts & Estates (Form 1041) 22.2 Simple vs. Complex Trusts 22.3 Distributable Net Income (DNI) 22.4 Tax-Exempt Organizations (Form 990) 22.5 Retirement Plans (Form 5500) 22.6 Qualified Retirement Plans Overview 22.7 Farm Taxation 22.8 Rental Real Estate Activities

23 Part 3, Chapter 23: Practice Before the IRS

23.1 What is Practice Before the IRS? 23.2 Who Can Practice (Full Rights) 23.3 Limited Practice Rights (AFSP, Unenrolled) 23.4 Special Relationships (Family, Employees) 23.5 PTIN Requirements 23.6 Circular 230 Overview 23.7 Office of Professional Responsibility (OPR)

24 Part 3, Chapter 24: Becoming & Maintaining EA Status

24.1 Two Paths to EA (Exam vs. IRS Experience) 24.2 Application Process (Form 23) 24.3 Background & Compliance Checks 24.4 Renewal Requirements (Form 8554) 24.5 Continuing Education Requirements 24.6 Inactive Status & Termination

25 Part 3, Chapter 25: Practitioner Duties (Circular 230)

25.1 Due Diligence Requirements 25.2 Knowledge of Client's Omission 25.3 Conflict of Interest Rules 25.4 Fee Requirements (Contingent, Unconscionable) 25.5 Advertising & Solicitation Rules 25.6 Tax Return Position Standards 25.7 Written Advice Standards 25.8 Sanctions & Penalties for Violations

26 Part 3, Chapter 26: Power of Attorney & Authorization

26.1 Form 2848 (Power of Attorney) 26.2 CAF (Centralized Authorization File) 26.3 Form 8821 (Tax Information Authorization) 26.4 Third-Party Designee 26.5 Signing Returns for Taxpayers 26.6 Client Confidentiality & Privilege 26.7 Representing Clients in Audits (Examination) 26.8 Appealing IRS Decisions 26.9 Collection Representation

27 Part 3, Chapter 27: Legal Authority & Research

27.1 Hierarchy of Tax Authority 27.2 Internal Revenue Code 27.3 Treasury Regulations 27.4 Revenue Rulings & Procedures 27.5 Court Cases & Precedent 27.6 Statutes of Limitations

28 Part 3, Chapter 28: Specific Representation Issues

28.1 Trust Fund Recovery Penalty (TFRP) 28.2 Innocent Spouse Relief (Form 8857) 28.3 Injured Spouse Allocation (Form 8379) 28.4 Penalty Abatement (FTA & Reasonable Cause) 28.5 Taxpayer Advocate Service (TAS) 28.6 Freedom of Information Act (FOIA)

29 Part 3, Chapter 29: Final Review & Exam Strategy

29.1 Exam Structure & Logistics (2026-2027) 29.2 The "Clock" of Representation (Master Deadlines) 29.3 Ethics vs. Law (Sanctions & Penalties) 29.4 Final Mock Review & Exam Strategy

30 Part 3, Chapter 30: Filing Process & E-File

30.1 E-File Requirements (The "More Than 10 Returns" Rule) 30.2 ERO Responsibilities 30.3 EFIN & Application Process 30.4 Form 8879 (Signature Authorization) 30.5 Record Retention & Data Security (WISP) 30.6 Preparer Penalties (Filing Specific)

2.1 Single & Married Filing Jointly

Key Takeaways Explain This Topic AI

Filing status is determined by marital status on December 31 - the last day of the tax year controls your status for the entire year

2025 standard deduction (post-OBBBA): $15,750 for Single filers and $31,500 for Married Filing Jointly

Married Filing Jointly creates joint and several liability - both spouses are 100% responsible for the entire tax debt, even after divorce

A surviving spouse can file jointly with the deceased spouse for the year of death if they did not remarry

Same-sex marriages legally performed in any state, U.S. territory, or foreign country are recognized for all federal tax purposes

Last updated: October 2026

Filing status is one of the most fundamental concepts in individual taxation. Your filing status determines your standard deduction amount, the tax bracket thresholds that apply to your income, and your eligibility for various credits and deductions. Choosing the correct filing status is often the first decision a tax preparer must make.

The December 31 Rule

Your marital status on the last day of the tax year determines your filing status for the entire year. This is called the "December 31 rule" and it applies regardless of what happened during the other 364 days of the year.

If you were married on December 31, you are considered married for the entire tax year. If you were unmarried on December 31, you are considered unmarried for the entire tax year.

Practical implications:

• A couple married on December 31 can file Married Filing Jointly for the entire year
• A couple divorced on December 31 must file as unmarried (Single or Head of Household if they qualify)
• The length of the marriage during the year does not matter
• Single Filing Status

Who Qualifies as Single?

You may file as Single if on December 31 you were:

• Unmarried (never married, divorced, or widowed), OR
• Legally separated under a divorce or separate maintenance decree issued by a court

Important distinction: Simply living apart from your spouse does NOT make you Single for tax purposes. You must have a court-issued divorce or legal separation decree. An informal separation, even if you lived in different states all year, still means you are married for tax purposes.

2025 Standard Deduction for Single Filers (post-OBBBA)

• Filing Status Standard Deduction
• Single (under 65) $15,750
• Single (65 or older) $17,750
• Single (65+ and blind) $19,750

NEW for 2025-2028 (OBBBA Senior Bonus Deduction): Qualifying singles age 65+ may add an additional $6,000 on top of the amounts above. The bonus phases out beginning at MAGI $75,000 (Single/HoH) and is fully phased out at $175,000.

2025 Tax Brackets for Single Filers

• Tax Rate Taxable Income Range
• 10% $0 - $11,925
• 12% $11,926 - $48,475
• 22% $48,476 - $103,350
• 24% $103,351 - $197,300
• 32% $197,301 - $250,525
• 35% $250,526 - $626,350
• 37% Over $626,350

Example calculation: A single filer with $60,000 in taxable income for 2025 pays:

• 10% on the first $11,925 = $1,192.50
• 12% on the next $36,550 ($11,926 to $48,475) = $4,386
• 22% on the remaining $11,525 ($48,476 to $60,000) = $2,535.50
• Total tax: $8,114 (effective rate ~13.5%)
• Married Filing Jointly (MFJ)

Who Qualifies for MFJ?

You may file Married Filing Jointly if on December 31 you were:

• Married and living together , OR
• Married and living apart (but not legally separated by court decree), OR
• Married at the time of your spouse's death during the year (and you did not remarry)

Both spouses must agree to file jointly. If one spouse wants to file separately, the other spouse cannot force a joint filing.

The Marriage Requirement

For federal tax purposes, you are considered married if:

• You are legally married under state law where the marriage was performed
• You are in a common law marriage recognized by the state where the marriage began
• You are legally married under the laws of a foreign country

Same-sex marriages: Since Revenue Ruling 2013-17 (following the Supreme Court's Windsor decision) and Obergefell v. Hodges (2015), the IRS recognizes all legal same-sex marriages for federal tax purposes. This applies regardless of where the couple currently lives, as long as the marriage was valid where it was performed.

2025 Standard Deduction for MFJ (post-OBBBA)

• Filing Status Standard Deduction
• MFJ (both under 65) $31,500
• MFJ (one spouse 65+) $33,100
• MFJ (both 65+) $34,700

NEW OBBBA Senior Bonus Deduction (2025-2028): Each qualifying spouse age 65+ may add an additional $6,000 (MAGI phase-out begins at $150K MFJ; fully phased out at $250K).

2025 Tax Brackets for Married Filing Jointly

• Tax Rate Taxable Income Range
• 10% $0 - $23,850
• 12% $23,851 - $96,950
• 22% $96,951 - $206,700
• 24% $206,701 - $394,600
• 32% $394,601 - $501,050
• 35% $501,051 - $751,600
• 37% Over $751,600

Notice that the MFJ brackets are exactly double the Single brackets through the 32% bracket. This eliminates the "marriage penalty" for couples with similar incomes in these brackets.

Joint and Several Liability

Critical concept for the EA exam: When you file a joint return, both spouses become jointly and severally liable for the entire tax liability.

• What Joint and Several Liability Means
• Each spouse is responsible for 100% of the tax, penalties, and interest on the joint return
• The IRS can collect the entire amount from either spouse
• This liability continues even after divorce
• A divorce decree stating one spouse will pay the taxes does NOT release the other spouse from IRS collection

Example: John and Mary file jointly and owe $20,000 in taxes. They divorce, and the divorce decree says John will pay all the taxes. John does not pay. The IRS can:

• Collect the full $20,000 from Mary
• Garnish Mary's wages
• Levy Mary's bank accounts
• File a lien against Mary's property

Mary's only recourse is to sue John in civil court for violating the divorce decree. The IRS does not have to wait.

Innocent Spouse Relief

In some cases, a spouse may be relieved of joint and several liability through Innocent Spouse Relief (Form 8857). Three types of relief exist:

• Innocent Spouse Relief - For erroneous items attributable to the other spouse that you did not know about
• Separation of Liability Relief - Divides the understated tax between former spouses
• Equitable Relief - For situations where it would be unfair to hold you liable
• Why MFJ Is Usually Advantageous

Married Filing Jointly provides several benefits compared to Married Filing Separately:

• Benefit MFJ MFS
• Standard deduction $31,500 $15,750
• Tax brackets Widest Narrowest
• Earned Income Credit Eligible NOT eligible
• Child Tax Credit Full credit Limited
• Education credits Eligible NOT eligible
• Student loan interest deduction Eligible NOT eligible
• Traditional IRA deduction Full phaseout range Reduced phaseout

General rule: In almost all cases, MFJ results in lower total tax than MFS. Calculate both options to determine the best choice.

When Single Might Be "Better" (Comparison)

This question is somewhat theoretical since a person's marital status is a legal fact, not a choice. However, comparing the brackets:

• Single filers have higher bracket thresholds than MFS filers
• Single standard deduction ($15,750) equals MFS standard deduction ($15,750)
• But Single filers cannot access the benefits of MFJ
• Special Situations
• Death of Spouse During the Year

If your spouse dies during the tax year and you do not remarry before December 31:

• You can file Married Filing Jointly for that year
• The joint return covers the deceased spouse's income for the period before death
• The surviving spouse signs the return and writes "Filing as surviving spouse" in the signature area

For the two years following the year of death, you may qualify for Qualifying Surviving Spouse status (covered in section 2.4)

If you remarry before December 31 of the year your spouse died:

• You file MFJ with your new spouse
• The deceased spouse's final return is filed as Married Filing Separately
• Annulled Marriages

If you obtain a court decree of annulment , which holds that no valid marriage ever existed:

• You are considered unmarried for that year and all prior years
• You must file amended returns (Form 1040-X) for all open tax years
• On amended returns, you file as Single or Head of Household (if you qualify)
• The statute of limitations for amended returns is generally 3 years from the original filing date
• Common Law Marriages

The IRS recognizes common law marriages if they are valid under state law. Key points:

Only some states recognize common law marriages (varies by state)

If you entered a valid common law marriage in a state that recognizes it, you are married for federal tax purposes

• This remains true even if you move to a state that does NOT recognize common law marriages
• You may file MFJ or MFS like any other married couple

For the EA exam: Know that the IRS follows state law for determining whether a common law marriage exists.

• Exam Tips
• December 31 is everything - Marital status on the last day of the year controls the entire year
• Legal separation requires a court decree - Living apart is NOT the same as legally separated
• Joint and several liability is absolute - Both spouses are 100% liable, period
• MFJ is almost always better - Know the specific benefits denied to MFS filers
• Annulment is retroactive - It undoes the marriage for all prior years
• Common law follows state law - If the state says you're married, the IRS agrees