Part I · Compliance — How the System Operates · pp. 77–90

Chapter 6: Filing, Reporting, and Substantiation — The Procedural Infrastructure

The procedural layer—filing status, reporting, substantiation, and retention—is where substantive tax analysis is tested and either holds or fails.

Overview

Chapter 6 covers the procedural mechanics of federal income tax compliance—the steps by which substantive tax analysis is documented, reported to the IRS, and defended under examination. The chapter explains that the federal income tax operates as a self-assessment system: taxpayers determine their own liability, file returns signed under penalty of perjury, and the government then verifies through information return matching and selective examination. The practitioner's role is to translate economic transactions into the categories, timing, and documentation the system demands.

The chapter walks through every major procedural topic: choosing the correct filing status, identifying dependents, determining whether a return is required, understanding information reporting and the IRS matching program, meeting substantiation standards (including heightened requirements for travel, meals, vehicles, and home offices), retaining records for the appropriate period, e-filing, making estimated tax payments, obtaining extensions, and recognizing that a filed return is a legal representation with real consequences. Throughout, the chapter emphasizes that a deduction or credit that cannot be substantiated effectively does not exist for tax purposes.

In this chapter

• 6.1 The Self-Assessment System in Practice — Taxpayers compute and report their own tax liability; the IRS verifies afterward.
• 6.2 Filing Status — The First Classification — Five statuses (Single, MFJ, MFS, HoH, QSS) determine rates, deductions, and credit eligibility.
• 6.3 Dependents — The Supporting Classification — Two categories (qualifying child and qualifying relative) drive credits and filing-status eligibility.
• 6.4 Filing Thresholds and Filing Requirements — Income thresholds by filing status and age determine who must file, with special rules for self-employed and dependents.
• 6.5 Information Reporting — The Matching Architecture — Forms W-2, 1099, K-1, and 1098 feed the IRS's automated matching program that flags most discrepancies.
• 6.6 Substantiation — The Burden of Proof — Taxpayers must document deductions and credits; certain categories face strict contemporaneous-record requirements.
• 6.7 Record Retention — Records must be kept based on the applicable statute of limitations, generally three to seven years.
• 6.8 E-Filing and Modern Compliance — E-filing is the standard mode, mandatory for most paid preparers, with faster processing and refund issuance.
• 6.9 Estimated Payments and Form 1040-ES — Pay-as-you-go rules require quarterly payments when withholding is insufficient, with safe harbors to avoid penalties.
• 6.10 Extensions of Time to File — An extension defers filing but not payment; certain election deadlines are not extended.
• 6.11 The Return as Representation — A signed return is a statement under penalty of perjury, and preparers face professional standards under Circular 230.
• 6.12 Conclusion — The procedural layer is where compliance is tested; unsubstantiated positions fail regardless of substantive merit.

Key terms

• Self-assessment system — The taxpayer, not the government, initially determines and reports tax liability on a return.
• Filing status — The classification (Single, MFJ, MFS, HoH, QSS) that sets tax rates, standard deduction, and credit eligibility.
• Qualifying child — A dependent meeting relationship, age, residency, and support tests under Section 152.
• Qualifying relative — A dependent who is not a qualifying child and meets relationship-or-household, gross income, and support tests.
• Information return — A form (W-2, 1099, K-1, etc.) filed with the IRS by third parties to report income paid to a taxpayer, used for matching.
• Section 274(d) substantiation — Heightened, contemporaneous recordkeeping required for travel, meals, gifts, and listed property.
• Cohan rule — A limited doctrine allowing estimated deductions where expenses were clearly incurred but exact amounts are undocumented.
• Form 8879 — The authorization document a taxpayer signs permitting a practitioner to e-file a return on the taxpayer's behalf.

Who needs this chapter

Any taxpayer, practitioner, or advisor who must file returns, classify filing status and dependents, maintain supporting records, or navigate the procedural requirements of federal income tax compliance.