**Judicial estoppel** / **Collateral estoppel** (issue preclusion) / **Equitable estoppel**

 Here's how the three separate out:

---

**Judicial estoppel** —

 bars a party from taking a position *inconsistent with one it successfully argued and won on* in an earlier proceeding.

• Why is it called that?

Judicial: 

 Relating to a [court] or [judge] (from the Latin judicium).

Estoppel: 

 A legal principle that [stops] or ["plugs"] someone from contradicting what they previously established as true (from the Old French estouper, meaning "to stop up" or "plug"). Purpose: 

  Protect the integrity of the courts, stop parties from "playing fast and loose." 

Elements: 

(1) clearly inconsistent later position, 

(2) the earlier position was *judicially adopted* (party actually succeeded on it), 

(3) unfair advantage if allowed. It doesn't require reliance by the other party — the "victim" is the court system itself. *New Hampshire v. Maine*, 532 U.S. 742 (2001).

---

**Collateral estoppel (issue preclusion)** —

 Bars *relitigating an issue* that was actually litigated and necessarily decided in a prior case between the same parties (or their privies). 

  It's about the *issue*, not a party's position — and it applies whether or not the party "won." 

  Collateral estoppel, also known as "issue preclusion," is a legal rule that stops a party from arguing an issue of fact or law that a court already decided in a past case. 

• Elements generally: 

  Same issue, actually litigated, necessarily decided, final judgment, same parties/privity.

---

**Equitable estoppel** —

 Bars a party from asserting a claim or right where its own conduct (a misrepresentation of fact) induced another party's *detrimental reliance*.

  This one is about protecting the reliant party, not the courts. Elements: 

• False representation, knowledge of the truth by the party estopped,

• Ignorance of the truth by the other party, intent that the other party act on it, and actual detrimental reliance. 

  Against the IRS specifically, equitable estoppel is rarely successful — courts require affirmative misconduct, not mere silence or an erroneous ruling.

---

**The core distinctions:**

- Judicial estoppel =

 Protects the *court's integrity*, triggered by a party's own prior *success* on an inconsistent position.

- Collateral estoppel =

 Protects *finality of issues*, triggered by prior *litigation and decision* of that specific issue.

- Equitable estoppel =

 Protects a *party's reliance*, triggered by *misrepresentation + detrimental reliance*, no prior judgment needed at all.

---

A quick tell for fact patterns: 

• No prior lawsuit involved

 → it's equitable estoppel or nothing. 

• Prior lawsuit, same issue decided

 → collateral estoppel.

• Prior lawsuit, party won by taking position X and now wants position Y 

→ judicial estoppel 

USTCP Q&A

2026 S-29 (1 point). 

TP owned unimproved land which she purchased 10 years ago. TP’s adjusted basis in the land was $20,000. On April 1, Year 1, TP donated the land to a qualified charitable organization. At the time of the donation, the fair market value of the land was $70,000. In Year 1, TP’s adjusted gross income is $100,000. 

 What is the amount of charitable deduction that TP will be able to use in Year 1 for donating the land? 

$70,000

 $30,000 

$20,000 

Zero 

None of the above 

 Points Awarded: $30,000.

---

S-29: Why $30,000

The land is long-term capital gain property (held 10 years, appreciated from $20,000 to $70,000), donated to a public charity. For gifts of appreciated capital gain property to a 50%-limit (public) charity, the deduction is normally based on FMV, but it's capped at 30% of AGI for the year — not the usual 60% that applies to cash gifts.

30% × $100,000 AGI = $30,000 deductible in Year 1.

(She could instead elect to reduce the gift to basis — $20,000 — and use the 50%/60% AGI limit, but that election isn't the default and isn't what's being tested here; the standard FMV/30%-of-AGI answer is $30,000.)

---

 (1/1)  2026 S-30 (1 point). 

TP owned unimproved land which she purchased 10 years ago. TP’s adjusted basis in the land was $20,000. On April 1, Year 1, TP donated the land to a qualified charitable organization. At the time of the donation, the fair market value of the land was $70,000. In Year 1, TP’s adjusted gross income is $100,000. 

 What is the amount of charitable donation that will carryforward? 

$70,000 

$40,000

 $20,000

 Zero 

None of the above

---

S-30: Why $40,000 carries forward

Her total charitable contribution amount (the deductible FMV of the gift) is $70,000. She was only able to use $30,000 of it in Year 1 because of the 30%-of-AGI ceiling.

$70,000 total − $30,000 used = $40,000 carryforward

This carries forward up to 5 additional years, subject each year to the same 30%-of-AGI limit for that type of property, until it's fully absorbed or expires.

USTCP Q&A

Question #1 -- Under the  Bipartisan Budget Act, (BBA), if a partnership receives a penalty, are the individual partners liable for that penalty? 

 Question #2 --Under BBA, can the IRS assess penalties directly at the partner level.

**Q1: No, not by default.** Under BBA (the centralized partnership audit regime, IRC §6221–6241), any imputed underpayment resulting from a partnership adjustment — including any related penalty, addition to tax, or additional amount — is determined, assessed, and collected at the partnership level [Freeman Law](https://freemanlaw.com/partnership-representatives-and-partnership-audits-the-bipartisan-budget-act-bba/imputed-underpayments/) , not against individual partners. The imputed underpayment is a liability of the partnership itself rather than the relevant partners. [AICPA & CIMA](https://www.aicpa-cima.com/resources/article/partnership-audit-and-adjustment-rules)

---

Individual partners become liable only in specific exceptions:

- **Push-out election (§6226):** The partnership elects to push adjustments (and penalties) out to the reviewed-year partners, who then report and pay their share on their own returns. Making a push-out election shifts the liability to pay an imputed underpayment from the partnership to the reviewed-year partners. [BDO](https://www.bdo.com/insights/tax/the-centralized-partnership-audit-regime-increased-irs-focus-on-partnerships-is-here)

- **Valid election out of BBA (§6221(b)):** Eligible small partnerships (100 or fewer partners, all eligible partner types) can elect out annually on a timely Form 1065, reverting to standard deficiency procedures against each partner individually. A partnership is subject to BBA unless it is an eligible partnership and makes an annual election out of BBA on a timely filed Form 1065. [irs](https://www.stayexempt.irs.gov/vi/newsroom/irs-launches-bba-centralized-partnership-audit-webpage)

- **Inconsistent reporting:** A reviewed-year partner who files inconsistently with the partnership's return and is individually audited (without a partnership-level audit) can be personally liable. [BDO](https://www.bdo.com/insights/tax/the-centralized-partnership-audit-regime-increased-irs-focus-on-partnerships-is-here)

- **Partnership ceases to exist or fails to pay:** Partners in a later year may become liable if the partnership terminates under §708(b)(1) or fails to pay the amount due within 10 days of notice and demand. [BDO](https://www.bdo.com/insights/tax/the-centralized-partnership-audit-regime-increased-irs-focus-on-partnerships-is-here)

---

**Q2: Generally, no.** The IRS assesses penalties at the partnership level as part of the imputed underpayment calculation — it doesn't directly assess partners unless one of the exceptions above applies (push-out election, valid opt-out, inconsistent reporting, or partnership default/dissolution). That said, partners can raise certain partner-level defenses (e.g., reasonable cause) during the modification process or after a push-out, even though the initial determination happens at the partnership level.

  Worth noting: a valid BBA election-out doesn't exist retroactively — it has to be made annually on a timely filed return, so this matters for how you advise clients going into a filing season versus mid-audit.

---

The **push-out election** (IRC §6226) is an alternative to the partnership paying the imputed underpayment (IU) itself. Instead, the partnership shifts responsibility for the tax to the **reviewed-year partners** — the people who were partners in the year under audit, not necessarily the current partners.

**How it works:**

- Within **45 days** of receiving the final notice of partnership adjustment (FPA), the partnership must make the election on a timely filed statement.

- The partnership issues each reviewed-year partner a **statement** (Form 8986) showing that partner's share of the adjustments.

- < cite index="7-1">A partnership making a valid push-out election is no longer liable for the imputed underpayment to which the election applies.</cite>

- Each reviewed-year partner then takes their share of the adjustment into account on their **own return for the year that includes the date the statement was furnished** — not by amending the reviewed year. < cite index="7-1">The reviewed-year partner must pay any additional chapter 1 tax for the taxable year that includes the date the statement was mailed.</cite>

- Partners generally owe **tax plus interest**, and the interest rate is 2 percentage points higher than the standard underpayment rate (a cost of choosing push-out over partnership-level payment).

**Why partnerships choose it:**

- Avoids having current partners bear the cost of adjustments that relate to a prior partner group (important after ownership changes/buy-ins/buy-outs).

- Lets partners with lower individual tax rates or favorable attributes (NOLs, credits) absorb the adjustment more efficiently than a flat partnership-level payment.

- Preserves each partner's ability to raise their own defenses (reasonable cause, etc.) on their share.

**Trade-offs:**

- More administrative burden — separate statements to every reviewed-year partner, correct calculations, timely furnishing.

- If not done correctly or timely, the election can be considered invalid, and liability reverts to the partnership by default.

- The premium interest rate makes it more expensive per dollar than if the partnership just paid the IU outright, so it's often a liquidity/fairness trade rather than a pure cost-saver.

  This is the mechanism your BBA partnership clients would use to keep an audit adjustment from unfairly landing on new partners who weren't around in the reviewed year.