The IRS Office of Appeals is an independent function within the IRS whose mission is to resolve tax controversies without litigation. Appeals officers consider the strength of both parties' positions, the hazards of litigation, and the costs of going to court in making settlement offers. Answer A is incorrect because Appeals Officers explicitly consider hazards of litigation, not only legal arguments. Answer B is incorrect because a taxpayer does not need to pay the tax before requesting an Appeals conference; the conference is part of the administrative process before the 90-day letter or after. Answer D is incorrect because an Appeals settlement is not binding in the sense that prevents a taxpayer from petitioning Tax Court if no agreement is reached; however, if the taxpayer signs a closing agreement, that is binding.

Under Section 6501(c)(1), in the case of a false or fraudulent return filed with intent to evade tax, there is no statute of limitations on assessment. The IRS may assess the deficiency at any time. This exception also applies when a taxpayer willfully attempts to evade tax or when no return is filed at all (Section 6501(c)(3)). Answer A (six years) is the extended statute for substantial omissions of gross income, not for fraud. Answer C (three years from discovery) is not a statutory provision; the Code provides no limitations period for fraud. Answer D (ten years) is the period for collection after assessment, not for the assessment of a deficiency on a fraudulent return.

Form 872 is a consent agreement between the taxpayer and the IRS that extends the statute of limitations for assessment to a specific date. This gives both parties additional time to resolve issues without requiring the IRS to prematurely assess a deficiency. The extension is binding on both parties. Answer B is incorrect because signing Form 872 does not waive appeal rights; it only extends the assessment period. Answer C is incorrect because Form 872 extends the statute to a specific agreed-upon date, not automatically by a fixed period. Answer D is incorrect because the consent is binding on both the IRS and the taxpayer once signed; neither party may unilaterally revoke it.

If the taxpayer does not petition the Tax Court within 90 days of the statutory notice of deficiency, the IRS may assess the deficiency at the expiration of the 90-day period and then proceed with collection. The notice of deficiency serves as the taxpayer's opportunity to contest the deficiency pre-payment in Tax Court; failure to act within 90 days forfeits that right. Answer A is incorrect because Tax Court jurisdiction in deficiency cases requires a timely petition; late petitions are not permitted based on reasonable cause. Answer B is incorrect because no second notice is required; the 90-day letter is the statutory prerequisite to assessment, and its expiration allows assessment. Answer D is incorrect because no automatic extension applies.

Once the tax has been paid, the taxpayer must follow the refund route: file an administrative claim for refund (typically on Form 1040X or Form 843). If the claim is denied or the IRS fails to act within six months, the taxpayer may file suit in U.S. District Court or the U.S. Court of Federal Claims. Answer A is incorrect because Tax Court jurisdiction in deficiency cases requires that the tax not yet be assessed; once paid, the taxpayer cannot use Tax Court for a pre-payment challenge on the same issue. Answer B is incorrect because the payment does not automatically trigger an Appeals conference and does not toll the statute in that way. Answer C is incorrect because an amended return alone does not generate an automatic refund; a formal refund claim and IRS determination are required.

Under Section 7121, a closing agreement between a taxpayer and the IRS is final and conclusive on all matters within its scope. It cannot be annulled, modified, set aside, or disregarded by either the IRS or the taxpayer, except in cases of fraud, malfeasance, or misrepresentation of a material fact. This finality makes closing agreements one of the strongest forms of resolution available in tax disputes. Answer A is incorrect because closing agreements bind the IRS as well as the taxpayer. Answer C is incorrect because closing agreements do not require Tax Court approval; they are administrative settlements. Answer D correctly notes the scope limitation but understates the finality.

Under Section 6501(b)(1), a return filed before its due date is treated as filed on the due date for purposes of the statute of limitations. Therefore, even though the taxpayer filed on January 20, the three-year statute of limitations runs from April 15 (the due date), giving the IRS until April 15 of the third year after the original due date. Answer A is incorrect because early filing does not start the limitations clock earlier than the due date. Answer C is incorrect for the same reason. Answer D is incorrect because the statute runs from the filing date (or due date if earlier), not from the IRS processing date.

Under Section 6511(a), a claim for refund must be filed within the later of (1) three years from the time the return was filed, or (2) two years from the time the tax was paid. If no return was filed, the period is two years from the date of payment. This means a taxpayer who paid tax late and then discovered an overpayment has at least two years from payment to file a claim. Answer A (one year) is too short and not a statutory period under Section 6511. Answer B (three years from due date only) ignores the two-year-from-payment alternative. Answer C (five years from payment) is not a standard refund claim period under the Code.

Under Section 6501(e), the statute of limitations for assessment is extended to six years when a taxpayer omits from gross income an amount that is more than 25% of the gross income reported on the return. This is known as the substantial omission rule. Answer A is incorrect because a missing schedule, while potentially a processing issue, does not automatically extend the statute to six years. Answer B is incorrect because a valuation understatement alone does not trigger the six-year period; it may trigger penalties, but the six-year rule applies to gross income omissions. Answer C is incorrect because a disallowed deduction affects taxable income but does not represent an omission of gross income under Section 6501(e).

Under Section 6502, the IRS generally has 10 years from the date of assessment to collect a tax by levy or court proceeding. This is distinct from the statute of limitations for assessment (3 years in most cases). After the 10-year collection period expires, the IRS's ability to collect the assessed tax is barred. Answer A (3 years) is the statute for assessment, not collection. Answer B (6 years) is the extended assessment period for substantial omissions, not the collection period. Answer C is incorrect because there is a 10-year limitations period on collection.