Gerald A. Beacom and Jean A. Beacom v. Commissioner of Internal Revenue, T.C. Memo. 2026-65, (Aug. 11, 2026)

For tax professionals, advising clients on credit carryforwards and other carryover tax items is a routine task. However, a taxpayer’s failure to maintain the records necessary to substantiate the origin of these carryovers can lead to disastrous audit outcomes. The recent Tax Court memorandum decision in Gerald A. Beacom and Jean A. Beacom v. Commissioner provides a stark reminder of the perpetual nature of the taxpayer’s recordkeeping burden, the severe limitations of retail tax software as a defense, and a widespread, critical misunderstanding of IRS record retention guidelines.

In this case, the court addressed a taxpayer’s attempt to use Alternative Minimum Tax (AMT) credit carryforwards that allegedly originated more than two decades prior to the tax year in question. The decision highlights that the standard statute-of-limitations lookback period does not shield carryover items from audit and that casualty losses (such as fires or floods) do not relieve taxpayers of their absolute duty to substantiate.

The Alternative Minimum Tax Credit Dispute

In Beacom v. Commissioner, the Internal Revenue Service (IRS) determined a deficiency of $11,057 and imposed an accuracy-related penalty under Section 6662(a) of $2,211.40 for the petitioners’ 2021 tax year. Both the deficiency and the penalty arose from the IRS’s complete disallowance of a claimed Alternative Minimum Tax (AMT) credit carryforward.

The taxpayers had relied on TurboTax software to file their returns and automatically track and carry forward their AMT credits over the years. The origin of the credit was highly nebulous; the petitioners surmised that the AMT credit originated sometime between 1999 and 2005, possibly arising from the exercise of a large stock option in 1999 or 2000. However, in 2008, a home flood destroyed all of their paper tax returns and other financial records from before that date, and they were unable to retrieve the pre-2008 data from TurboTax.

At trial, the evidentiary record was extremely thin. The IRS had no tax transcripts for the petitioners prior to 2017. The only evidence from before 2017 in the record consisted of unsigned, unverified copies of the petitioners’ 2010 and 2013 Forms 1040, which reported a carryforward of $62,190 on Form 8801 (Credit for Prior Year Minimum Tax) but applied zero of the credit toward federal income tax liability in those years. Beginning in 2017, the taxpayers’ verified returns tracked the carryforward as follows:

2017: Reported a carryforward of $57,025, applied $3,974, and carried forward $53,051.
2018: Applied $3,889 and carried forward $49,162.
2019: Applied $3,723 and carried forward $45,439.
2020: Applied $4,154 and carried forward $41,285.
2021: Applied $11,057 and carried forward $30,228.

On July 22, 2024, the IRS issued a Notice of Deficiency disallowing the $11,057 credit claimed on the 2021 return and computing the accuracy-related penalty.

Evidentiary Issues and Pretrial Order Compliance

A minor procedural issue arose at trial regarding the admissibility of the petitioners’ 2010 and 2013 returns (Exhibits 23-P and 24-P), which were unsigned copies that the petitioners had not exchanged with the IRS at least 14 days before trial, as required by the court’s Standing Pretrial Order. Under Tax Court Rule 131(b), a party’s failure to comply with a standing pretrial order may result in sanctions, including the exclusion of unexchanged evidence.

In evaluating the late-produced documents, the Tax Court weighed whether the IRS was prejudiced. The judge noted that while the IRS did not have sufficient time to review the documents, the IRS could not have verified them anyway because transcripts from before 2017 were unavailable. Furthermore, the court observed that “these returns only confirm that petitioners carried the AMT credit forward from periods before the years reported on those returns. They do not explain the origin of the AMT credit.” The court ultimately admitted the late-produced returns to ensure the record contained all available evidence, but noted that their admission did not change the outcome because they failed to establish the origin or validity of the credit.

Allocation of the Burden of Proof and the Legislative Grace Doctrine

As a baseline tax controversy principle, the taxpayer bears the burden of proving that the Commissioner’s deficiency determinations are in error. Under Section 7491(a), the burden of proof may shift to the Commissioner if the taxpayer introduces “credible evidence” with respect to a factual issue and satisfies strict statutory conditions, such as cooperating with reasonable IRS requests.

The Beacoms argued that the burden of proof should shift to the IRS because they had maintained records in accordance with IRS guidance, made a good-faith effort to comply, and cooperated with the agency. The court rejected this argument, holding that the petitioners “misconstrue the standard in section 7491(a).” The court noted that because they provided no credible evidence regarding the actual origin of the credit, the burden remained firmly with them.

The court reiterated the foundational tax principle that “credits, like deductions, are a matter of legislative grace, and the taxpayer bears the burden of proving entitlement to them.” Taxpayers have an explicit duty under Section 6001 and Treas. Reg. § 1.6001-1 to maintain adequate, accurate records to substantiate all items reported on their returns.

Reflecting on circumstances beyond a taxpayer’s control, the Tax Court made it clear that casualty losses do not excuse a taxpayer’s failure to meet this burden. Citing Al-Soufi v. Commissioner, the court reminded practitioners that “even where a taxpayer has lost records through no fault of his own, he is not relieved from the burden of substantiation.” Taxpayers are expected to make a reasonable effort to reconstruct their records through secondary sources if the originals are destroyed. Because the Beacoms failed to present any corroborating evidence or a reasonable reconstruction of the 1999–2005 period, they could not sustain their burden.

Understating the Credit: Mechanics of the Alternative Minimum Tax Credit

To understand the court’s application of the law, it is helpful to review the structural mechanics of the alternative minimum tax credit. Section 55(a) imposes an AMT in addition to regular income taxes, calculated on a broader income base—alternative minimum taxable income (AMTI)—which incorporates various tax preferences and adjustments.

Under Section 53, a taxpayer who has paid AMT in prior years is allowed a credit against their subsequent regular tax liability. Specifically, the minimum tax credit for any taxable year is the excess of the adjusted net minimum tax imposed for all prior taxable years beginning after 1986 over the amount allowable as an AMT credit in those intervening years. The credit is limited under Section 53(c) to the excess of the regular tax liability (reduced by other credits) over the tentative minimum tax for the year.

In Beacom, the petitioners asserted that their credit originated from the exercise of incentive stock options in 1999 or 2000 and carried over continuously. However, because they did not produce the return reporting the initial AMT liability, the first return on which the credit was claimed, or the intermediate returns from that origin point to 2017, the court had no means of verifying the credit’s source or confirming what carryforward balance remained available for the 2021 tax year. Under Section 6214(b), the Tax Court has jurisdiction to consider facts from prior tax years to redetermine a deficiency for the year currently before it, but the court is “not bound to accept a taxpayer’s unverified, undocumented testimony.”

The Materiality Standard and the Misunderstood Guidance of Publication 17

Perhaps the most instructive aspect of Beacom for practicing CPAs and EAs is the taxpayer’s defense regarding IRS recordkeeping guidelines. The petitioners defended their lack of documentation by arguing that IRS guidance in Publication 17, Your Federal Income Tax, states that taxpayers are only required to retain prior tax returns for a maximum of seven years. They argued that since their credit arose between 1999 and 2005 (well over seven years before the 2021 tax year), they were legally permitted to discard the original records.

The Tax Court flatly rejected this argument, stating: “They misread that guidance.” Judge Pugh clarified that while Publication 17 outlines various periods of limitations for standard tax items, it requires taxpayers to retain documentation supporting the items reported on a return for the period of limitations applicable to that specific return.

The court laid down a critical rule of carryover substantiation:

“Petitioners should have maintained records supporting their claimed AMT credit for seven years from the date of the return on which they applied the credit, not seven years from the date of the return when they first paid the AMT.”

Applying this to the facts, the court explained that “petitioners were required to retain, as evidence of their eligibility for the AMT credit in tax year 2021, records (such as their prior returns) documenting the source of the AMT credit (and its prior utilization, if any) for seven years from 2021, not seven years from 1999 or 2000.”

This holding aligns with Treas. Reg. § 1.6001-1(e), which dictates that tax records “shall be retained so long as the contents thereof may become material in the administration of any internal revenue law.” Because a carryover item remains “material” to the calculation of the tax liability in every single year it is utilized or carried forward, the statutory record-retention clock does not begin to run until the tax return for the final utilization year is filed. For a credit carried forward indefinitely, the underlying generating records must also be retained indefinitely.

The Limits of Tax Software and the Section 6662(a) Accuracy-Related Penalty

The IRS also assessed an accuracy-related penalty under Section 6662(a) and (b)(2), which imposes a 20% penalty on the portion of any underpayment of tax attributable to a “substantial understatement of income tax.” For individual taxpayers, an understatement is “substantial” if it exceeds the greater of 10% of the tax required to be shown on the return or $5,000. The disallowed AMT credit created an underpayment of $11,057, easily satisfying the definition of a substantial understatement.

Under Section 7491(c), the Commissioner bears the burden of production regarding the penalty, including demonstrating compliance with Section 6751(b)(1), which requires written supervisory approval of the penalty by the immediate supervisor of the individual making the determination. The record established that the IRS complied with these requirements.

Once the Commissioner meets the burden of production, the taxpayer bears the burden of proving that the penalty is inapplicable or establishing an affirmative defense, such as having “reasonable cause” and acting in “good faith” under Section 6664(c). Reasonable cause is evaluated on a case-by-case basis, taking into account all facts and circumstances, including an honest, reasonable misunderstanding of the law in light of the taxpayer’s experience, knowledge, and education.

The Beacoms argued that they acted with reasonable cause because they relied on TurboTax to file their returns and automatically track the credit carryforward. The Tax Court dismissed this argument out of hand, quoting its prior precedent in Bunney v. Commissioner: “Tax preparation software is only as good as the information one puts into it.”

The court clarified that commercial tax preparation software does not constitute a “professional tax adviser.” Relying on software to carry forward a number does not establish reasonable cause or good faith when the taxpayer is responsible for entering the baseline tax information and fails to verify its accuracy or retain the underlying records. Because the petitioners did not consult a tax professional and made no reasonable effort to reconstruct their records or present other credible evidence, the court sustained the 20% accuracy-related penalty.

Practical Takeaways for CPAs and Enrolled Agents

The decision in Beacom v. Commissioner contains vital risk-management lessons for tax practitioners:

Carryover Items Require Permanent Records: Advise clients that any carryover item—including AMT credits, Net Operating Losses (NOLs), suspended passive activity losses, capital loss carryovers, and charitable contribution carryovers—requires the retention of the original generating tax returns and supporting documentation (such as Form 8801, Form 8582, or Form 1040 Schedule D) for as long as the carryover exists, plus the period of limitations for the year of final utilization.
The “Materiality” Standard Controls: Remind clients that Treas. Reg. § 1.6001-1(e) is the ultimate authority on record retention. If an item generated thirty years ago is being utilized on today’s return, those thirty-year-old records are “material” and must be kept.
Casualties Do Not Waive Substantiation: In the event of a fire, flood, or other natural disaster, the taxpayer must proactively seek to reconstruct their tax records. Practitioners should assist clients in obtaining official IRS tax transcripts (or filing Form 4506 to obtain actual copies of prior returns) and gathering secondary evidence (such as brokerage statements or corporate option agreements) before claiming carryovers on current returns.
Software Does Not Insulate Against Penalties: Advise clients that the IRS and Tax Court will not accept “the software tracked it” as a defense against accuracy-related penalties. Retail software does not verify the legal validity of carryforwards; it merely performs arithmetic on user-provided inputs.

By reinforcing these recordkeeping standards with clients, practitioners can prevent catastrophic disallowances and penalty assessments during future IRS examinations.

Prepared with assistance from Google Notebook.