OPINION
This is an appeal from a tax court’s interlocutory order in a partnership tax proceeding. We dismiss the appeal because we lack appellate jurisdiction under either the practical finality doctrine or the collateral order doctrine.
I
John Ross Gregory and his wife Rita founded JT USA, LP, a limited partnership, in the 1970s. In 2000, the Gregorys accepted an offer to sell the company that would result in a $82 million capital gain. According to the IRS, the Gregorys decided to engage in a so-called Sоn-of-BOSS transaction 1 to avoid the capital gains that they would otherwise incur. In furtherance of this scheme, the IRS alleges, the Gregorys transferred ownership of JT USA to two different entities (JT Racing, Inc., an S corporation, and JT Racing, LLC, a limited liability company), bоth of which they controlled. That same year, JT USA engaged in a series of transactions generating a $32.5 million loss. As a result, JT USA did not pay any capital gains taxes in 2000.
Under the applicable statute of limitations, see 26 U.S.C. §§ 6501, 6229(f)(1), the IRS had four years to assess a tax deficiency against JT USA for the 2000 tax year. In October 2004, a few months bеfore the statute of limitations ran, the IRS issued a notice of final partnership administrative adjustment (FPAA) to JT USA for the 2000 tax year. An FPAA is a proposed tax adjustment calculated by the IRS, which initiates a TEFRA 2 proceeding.
The IRS made a clerical error in its issuance of the FPAA, however, in fаiling to notify the Gregorys about the TEFRA proceeding, as required by statute; instead, it notified only JT USA. See 26 U.S.C. § 6223(d)(1). Because of this error, the IRS was obliged to give the Gregorys the right to elect not to participate in the TEFRA proceeding. See 26 U.S.C. § 6223(e)(3)(B). The Gregorys notified the IRS that they elected to participate in the TEFRA proceeding with respect to their direct interests in JT USA 3 (i.e., their personal ownership interests in JT USA), but not with respect to their indirect interests 4 (i.e., their ownership inter *1170 ests in JT Racing, Inc., and JT Racing, LLC, which gave the Gregorys an indirect ownership interest in JT USA).
After the Grеgorys’ election, the IRS could not proceed against the Gregorys with respect to their indirect interests in JT USA within the TEFRA proceeding. Although the IRS still had an additional year to bring such an action outside the proceeding, see 26 U.S.C. § 6229(f)(1), the IRS failed to do so, and the statute of limitations for bringing such an action ran at the end of 2005. Nor could the IRS proceed against JT Racing, Inc. and JT Racing, LLC within the TEFRA proceeding, because these entities were tax immune; the IRS may impose taxes only on the shareholders of S corporations and limitеd liability companies, not on the entities themselves. See generally 26 U.S.C. § 1363(a) (S corporations generally not subject to income tax); 26 U.S.C. § 701 (partnerships not subject to income tax); 26 C.F.R. § 301.7701-3 (LLC may be treated as a partnership).
Accordingly, by 2006, the IRS had only two options to recover the alleged tax deficiency. The IRS needed either to show that the Gregorys had a direct interest in JT USA at the relevant time during 2000, or to invalidate the Gregorys’ election out of the TEFRA proceeding with respect to their indirect interests in JT Racing, Inc. and JT Racing, LLC.
The Gregorys brought this dispute to a head in November 2006, when they filed a petition with the Tax Court to eliminate themselves from the TEFRA proceeding, and substitute JT Racing, LLC in their place. They argued that when JT USA executed the alleged Son-of-Boss transaction, they were only indirect partners of JT USA, and because the IRS had not assessed a tax deficiency against them before the statute of limitations had run, they had no tax liability at all. In response, the IRS argued that taxpayers are not authorized to “bifurcate” their election to participate in TEFRA proceedings, and therefore the Gregorys’ election out with respect to their indirect interest in JT USA was invalid.
The Tax Court rejected the Gregorys’ argument that they should be dismissed because they had no direct interests in JT USA at the relevant time, noting that the case was only at thе pretrial stage, and it had not yet reached the merits of that issue. The Tax Court agreed, however, that the Gregorys’ bifurcated election was valid. Accordingly, in an October 8 order, it dismissed the Gregorys as indirect partners from the TEFRA proceeding and allowеd JT Racing, LLC to intervene.
The IRS asked the Tax Court to certify this October 8 order for interlocutory appeal under 26 U.S.C. § 7482(a)(2)(A). The Tax Court declined, acknowledging that as a “practical matter, [the October 8 order] decided the ease largely in favor оf the [Gregorys],” but noting that it had not “enter[ed] a final decision in the case” and that the Gregorys could yet face liability if it turned out they were direct partners at the time of the alleged Son-of-Boss transaction. Nevertheless, the Tax Court did not object to the IRS filing a notice of appeal.
II
The threshold question before us is whether we have jurisdiction to hear the IRS’s appeal of the Tax Court’s interlocutory ruling. Absent certain exceptions not applicable here, Congress has given us appellate jurisdiсtion only over “final decisions” of the district court and Tax Court. 28 U.S.C. § 1291 (appellate review only over “final decisions” of the district court);
*1171
Cheng v. Comm’r,
Here the Tax Court’s order decided only whether the Gregorys’ bifurcatеd election was valid, and did not address the merits of the IRS’s claim. In determining whether we have jurisdiction over such interlocutory orders, we treat our jurisdiction over appeals of Tax Court decisions “as identical to appellate jurisdiction over district courts.”
Brookes v. Comm’r,
A
We have interpreted the practical finality doctrine narrowly.
See Solis v. Jasmine Hall Care Homes, Inc.,
The Tax Court’s order in this case does not meet the first and second factors of our practical finality test. As to the first factor, an order is “marginally final” when the “pending proceedings have little substance and will
not
affect the potentially dispositive and obviously central issue.”
Wabol v. Villacrusis,
Nor does
Pauly v. U.S. Dep’t of Agriculture,
B
The Gregorys also argue that we have jurisdiction over this appeal under the collateral order doctrine, which gives a fеderal appellate court authority to review a narrow class of decisions that does not “terminate the litigation, but must, in the interest of ‘achieving a healthy legal system,’ nonetheless be treated as ‘final.’ ”
Digital Equip. Corp. v. Desktop Direct, Inc.,
The October 8 order does not meet this stringent standard. Although it undoubtedly resolves an important issue separate from the merits, namely, whether the Gregorys’ bifurcated election was valid, the Tax Court’s decision on this issue is not effectively unreviewable on appeal from a final judgment. If the Tax Court ultimately determines that the Gregorys did not retain a direct interest in JT USA at the relevant time, and therefore do not have tax liability, the IRS will be able to appeal that ruling along with the Tax Court’s prior interlocutory order that the Gregorys had authority to bifurcate their election in the TEFRA proceeding. “[A]n appeal from the final judgment draws in question all earlier non-final orders and all rulings which produced the judgment.”
Grand Canyon Trust v. Tucson Elec. Power Co.,
DISMISSED.
Notes
. For a detailed description of the Son-of-Boss scheme, see
Kligfeld Holdings v. Comm’r,
. TEFRA stands for the Tax Equity and Fiscal Responsibility Act of 1982, which governs partnership taxes.
. A direct interest is one held by a direct partner, i.e., someone who holds a partnership interest directly in the partnership, and not through another еntity.
. An indirect interest is one held by an indirect partner, i.e., someone who holds a partnership interest "through 1 or more pass-thru partners.” 26 U.S.C. § 6231(a)(10). A partnership or S corporation that owns a partnership interest in another entity is deemed to be a "pass-thru partner,” see 26 U.S.C. § 6231(a)(9), and the owner of that partnership or S corporation is deemed to be an *1170 indirect partner holding only an indirect interest in that entity, see id. § 6231(a)(10).
