REG procedure coverage for audits, substantiation, deadlines, penalties, and research authority.
This chapter covers the procedural side of federal taxation: how returns are examined, what records and disclosures matter, when deadlines cut off action, and where authoritative support comes from. These topics are highly testable because they combine rules, timing, and judgment.
Procedure questions are not just administrative detail. They determine whether the IRS may assess tax, whether a taxpayer may claim a refund, whether a position is adequately supported, and whether a mistake creates a civil penalty or a more serious exposure. Start each fact pattern by identifying the procedural posture before applying the tax rule.
| Procedural issue | What changes the answer | Common REG trap |
|---|---|---|
| Examination and appeals | The stage of the dispute determines available responses and escalation options. | Treating an IRS notice, audit request, and court petition as the same event. |
| Substantiation | Records and disclosure affect whether deductions, credits, or positions survive review. | Assuming a correct tax result is enough without support. |
| Assessment limitations | Timing controls whether the IRS can assess additional tax. | Forgetting that fraud, omission, or no return can change the normal period. |
| Refund claims | Filing and payment dates affect whether the taxpayer can recover overpaid tax. | Applying assessment deadlines to refund windows. |
| Penalties | Conduct, intent, disclosure, and reasonable cause affect penalty exposure. | Calling every penalty issue criminal when most tested penalties are civil. |
| Step | What to do | Why it matters on REG |
|---|---|---|
| 1. Identify procedural posture | Determine whether the taxpayer is filing, substantiating, under examination, appealing, claiming a refund, or facing penalties. | Available actions depend on procedural stage. |
| 2. Check records and disclosure | Evaluate substantiation, adequate disclosure, return positions, and support for deductions or credits. | Correct tax treatment can still fail without support. |
| 3. Apply deadlines | Separate assessment periods, refund claim windows, filing due dates, and extension effects. | Timing rules can bar otherwise valid claims or assessments. |
| 4. Classify penalties | Distinguish civil penalties, criminal exposure, negligence, fraud, reasonable cause, and disclosure defenses. | Most REG penalty questions are about conduct and mitigation. |
| 5. Rank authority for support | Use statutes, regulations, rulings, cases, and administrative guidance according to authority strength. | Procedure and research questions often turn on support quality. |