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Income Tax Fundamentals 2026

By Gerald E. Whittenburg, Steven Gill

44th Edition © 2026
Discipline:Taxation
Course:Taxation
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Introduce today's important areas of tax law with Whittenburg/Gill's "Income Tax Fundamentals 2026," 44th Edition. The practical workbook presentation takes a unique forms-based approach that has set the standard in tax education for over 30 years. Current examples and real tax forms present the latest tax laws. Updated end-of-chapter questions and online problems reinforce students' skills and understanding of complex aspects of tax law. This edition's tax return problems use source documents identical to those of real clients and provide extensive overlap with the federal tax education requirements for tax preparers in California, Oregon and Maryland. Each new edition utilizes Intuit® ProConnect™ tax software for further hands-on practice. CNOWv2's online learning platform and homework resources are also available to help you prepare students to become successful tax preparers.

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About this product

Introduce today's important areas of tax law with Whittenburg/Gill's "Income Tax Fundamentals 2026," 44th Edition. The practical workbook presentation takes a unique forms-based approach that has set the standard in tax education for over 30 years. Current examples and real tax forms present the latest tax laws. Updated end-of-chapter questions and online problems reinforce students' skills and understanding of complex aspects of tax law. This edition's tax return problems use source documents identical to those of real clients and provide extensive overlap with the federal tax education requirements for tax preparers in California, Oregon and Maryland. Each new edition utilizes Intuit® ProConnect™ tax software for further hands-on practice. CNOWv2's online learning platform and homework resources are also available to help you prepare students to become successful tax preparers.

This edition provides overlap with the tax preparer education requirements. It covers federal tax provisions and concepts required by regulations for tax preparers in California, Maryland and Oregon, aiding students in states with tax preparer regulations.

Updated tax return problems include additional real-life source documents like Form W-2, 1099s, income statements and trial balances. This practical approach helps students prepare for real-world tax return preparation.

Updated CNOWv2 end-of-chapter questions and problems create a seamless learning experience. Students can complete useful online homework with problems and exercises that remain even more consistent with the printed book.

This edition's updated applications ensure students are practicing with the latest tax information available. Proven and new end-of-chapter questions, tax return problems and test bank problems all reflect the dozens of standard changes impacting tax preparation today.

Table of contents

Chapters

Cover Page
Title Page
Copyright Page
Concise, Current, & Practical!
Income Tax Fundamentals
Step-by-Step Format Builds Student Confidence
Real-World Applications Keep Students Engaged
Income Tax Fundamentals
Note to Students: Maximize Your Reading Experience
About the Authors
Acknowledgments
The Annotated 1040 Map
Questions
Chapter 1. The Individual Income Tax Return*Preview this chapter
Chapter 2. Gross Income and Exclusions
Chapter 3. Business Income and Expenses
Chapter 4. Additional Income and the Qualified Business Income Deduction
Chapter 5. Deductions for and from AGI
Chapter 6. Accounting Periods and Other Taxes
Chapter 7. Tax Credits
Chapter 8. Depreciation and Sale of Business Property
Chapter 9. Employment Taxes, Estimated Payments, and Retirement Plans
Chapter 10. Partnership Taxation
Chapter 11. The Corporate Income Tax
Chapter 12. Tax Administration and Tax Planning
Appendix A. Tax Rate Schedules and Tax Table
Appendix B. Earned Income Credit Table
Appendix C. 2025 Withholding Tables
Appendix D. Additional Comprehensive Tax Return Problems
Appendix E. Solutions to Self-Study Problems
Appendix F. Blank Forms
Show more

Chapter 1. The Individual Income Tax ReturnPreview this chapter ↗

1-1. History and Objectives of the Tax System
Preview this section ↗
1-1a. Tax Law History and Objectives ↗
1-2. Reporting and Taxable Entities
Preview this section ↗
1-2a. The Individual ↗
1-2b. The Corporation ↗
1-2c. The Partnership ↗
1-3. The Tax Formula for Individuals
Preview this section ↗
1-3a. Gross Income ↗
1-3b. Deductions for Adjusted Gross Income ↗
1-3c. Adjusted Gross Income (AGI) ↗
1-3d. Standard Deduction or Itemized Deductions ↗
1-3e. Other from AGI Deductions ↗
1-3f. The Gross Tax Liability ↗
1-4. Who Must File ↗
1-5. Filing Status and Tax Computation
Preview this section ↗
1-5a. Single Filing Status ↗
1-5b. Married Filing Jointly ↗
1-5c. Married Filing Separately ↗
1-5d. Head of Household ↗
1-5e. Surviving Spouse with Dependent Child ↗
1-5f. Tax Computation ↗
1-6. Qualifying Dependents
Preview this section ↗
1-6a. Dependents ↗
1-6b. Qualifying Child ↗
1-6c. Tiebreaker Rules ↗
1-6d. Qualifying Relative ↗
1-6e. Qualifying Person for Head of Household ↗
1-6f. Credits for Children and Other Dependents ↗
1-7. The Standard Deduction
Preview this section ↗
1-7a. Additional Amounts for Old Age and Blindness ↗
1-7b. Individuals Not Eligible for the Standard Deduction ↗
1-7c. Special Limitations for Dependents ↗
1-8. A Brief Overview of Capital Gains and Losses
Preview this section ↗
1-8a. Capital Gains and Losses ↗
1-9. Tax and the Internet
Preview this section ↗
1-9a. The IRS Website, www.irs.gov ↗
1-9b. Intuit’s ProConnect Tax Online ↗
1-9c. Tax Notes ↗
1-9d. ChatGPT and Artificial Intelligence ↗
1-10. Electronic Filing (E-filing) ↗
Key Terms ↗
Key Points ↗
Questions and Problems ↗
Show more

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