1. What Triggers an IRS Audit and When Should You Act?
The IRS initiates an examination when it selects a return for review based on statistical analysis, industry patterns, or specific red flags on your return. Once you receive a notice of examination, you have a limited window to respond and preserve your appeal rights before the agency issues a formal assessment.
Most examinations begin with a letter requesting specific documentation to support reported income, deductions, or credits. Failure to respond within the stated timeframe can result in a default assessment without your input. An income tax attorney can respond to examination requests on your behalf, negotiate with the examiner, and prepare you for an appeals hearing if the initial determination is unfavorable.
How Does the Examination Timeline Affect Your Defense?
The IRS generally has three years from the return filing date to assess additional tax, though this period can extend to six years if substantial income is omitted and to an unlimited period if fraud is suspected. Once an examination begins, the IRS must issue a formal notice of deficiency before it can assess tax in most cases. That notice gives you 90 days to petition the U.S. Tax Court without paying the disputed amount first, a critical procedural advantage. If you miss the 90-day deadline, you forfeit the right to litigate in Tax Court and must pay the assessment, then file a refund claim and sue in federal district court or the Court of Federal Claims. Timing errors at this stage are often irreversible, making early consultation with an income tax attorney essential to preserve your options.
2. What Defensive Positions Can You Raise during an IRS Dispute?
Your defense depends on the nature of the IRS's proposed adjustment. Common defensive theories include factual disputes over deduction eligibility, substantiation challenges, statute of limitations arguments, and procedural defects in the examination itself.
If the IRS claims you overstated a deduction, you can challenge the factual basis by presenting contemporaneous records, expert appraisals, or testimony showing the deduction was accurate and properly substantiated. If the examination was initiated outside the statute of limitations period without legal justification, the IRS may lack authority to assess. Procedural defects, such as failure to provide adequate notice or to allow you a meaningful opportunity to respond, can also support a dismissal motion in litigation. An income tax compliance attorney will identify which defenses apply to your facts and determine whether they are stronger in an administrative forum or in court.
What Role Does Substantiation Play in Winning a Dispute?
Substantiation is often outcome-determinative. The IRS bears the initial burden of establishing that a proposed adjustment has a basis in fact and law, but once it does, you must prove your position by a preponderance of the evidence. For deductions, you need contemporaneous written acknowledgment or business records showing the nature, date, and amount of the expense. If your records are incomplete or lost, the tax court may allow a reconstructed estimate under the Cohan doctrine, but only if you demonstrate good faith and provide some credible evidence of the expense. Courts scrutinize reconstructed records closely, so original documentation is far stronger. Gathering and organizing all relevant records before the examination escalates is critical to your defense posture.
3. How Does the Appeals Process Work and When Should You Pursue It?
If you disagree with the IRS examiner's findings, you can request an appeals conference before the IRS Office of Appeals, a quasi-independent administrative body within the IRS. The appeals process is less formal than litigation and often results in settlement through mutual concession on disputed issues.
To qualify for appeals, you must file a written protest within 30 days of the examination report. The protest must include a statement of facts, legal arguments, and citations supporting your position. The appeals officer will review the case de novo, meaning they will consider arguments and evidence you did not present to the examiner. Many disputes settle at appeals because both sides recognize the uncertainty of litigation and the cost savings of compromise. However, if the appeals officer upholds the IRS position or you are dissatisfied with the settlement offer, you retain the right to litigate in Tax Court or in federal court. An income tax attorney can prepare your protest, present evidence and argument at the appeals conference, and advise whether settlement terms are reasonable.
What Factors Should You Weigh When Deciding between Appeals and Litigation?
Appeals is faster and less expensive than litigation, but offers no precedent value and no public record of the outcome. Litigation in Tax Court, federal district court, or the Court of Federal Claims is slower and costlier, but creates a public record and can establish favorable precedent if the court rules in your favor. Procedural defects in the examination record, such as inadequate notice or failure to provide a meaningful conference, can support a motion to dismiss before trial, potentially saving years of litigation. You should also consider the strength of your substantiation, the amount at issue, and the likelihood of IRS appeal if you win. An income tax attorney will model these factors and recommend the forum most likely to produce a favorable outcome for your specific dispute.
4. What Steps Should You Take Now to Protect Your Position?
Immediate action preserves your rights and strengthens your case. First, gather all original documents related to the disputed items, including receipts, invoices, bank statements, and contemporaneous records. Second, do not ignore IRS correspondence, as missing a deadline can forfeit your appeal rights or result in a default assessment. Third, consult an income tax attorney before responding to any IRS request, as your response becomes part of the examination record and can be used against you if the dispute escalates.
Document preservation is critical. If the IRS is investigating potential fraud or a pattern of underreporting, preserve all communications with accountants, tax preparers, and advisors. Avoid destroying or altering any records, as spoliation can result in adverse inferences and heightened penalties. If you are facing a large assessment or believe the IRS examination is unfounded, filing a protective claim for refund before the statute of limitations expires preserves your right to sue for a refund later. Finally, evaluate whether you qualify for installment agreements, offers in compromise, or other relief programs that can ease the financial burden while you contest the assessment.
| Procedural Stage | Your Action | Key Deadline |
|---|---|---|
| IRS Examination Begins | Gather documents; consult tax attorney | Respond within IRS timeframe |
| Examination Report Issued | File protest if you disagree | 30 days from report |
| Appeals Conference | Present evidence and legal arguments | Per appeals officer direction |
| Notice of Deficiency | Petition Tax Court or pay and sue for refund | 90 days to petition Tax Court |
| Refund Claim | File if you paid; preserve litigation rights | Within 3 years of payment |
IRS disputes are complex and procedurally unforgiving. Missing a single deadline or failing to preserve evidence can eliminate your ability to contest the assessment in your preferred forum. By engaging an income tax attorney early, you ensure that your response strategy is sound, your documentation is complete, and your rights are preserved as the dispute progresses from examination to appeals or litigation. The goal is to position yourself with the strongest factual and legal footing for the forum where your case will ultimately be decided.
01 Jun, 2026
