127 T.C. 178">*178 WELLS, Judge: The instant case is before the Court on respondent's motion to enter a decision. The parties previously had represented to the Court that the case was settled and filed a stipulation of settled issues. We must decide: (1) Whether we have jurisdiction to decide whether respondent improperly credited to an earlier taxable year an overpayment that petitioners reported on their income tax return for taxable year 2002, and, (2) if we find that we have such jurisdiction, whether respondent improperly credited the 127 T.C. 178">*179 overpayment. Unless otherwise indicated2006 U.S. Tax Ct. LEXIS 33">*35 all section references are to the Internal Revenue Code, as amended.

FINDINGS OF FACT

Some of the facts and certain exhibits have been stipulated. The parties' stipulations of fact are incorporated in this Opinion by reference and are found as facts. At the time of filing the petition, petitioners resided in Archer, Florida.

Petitioners owned a minority interest, as tenants by the entirety, in AllChem Industries Holding Corp. (AllChem), an S corporation. AllChem made distributions to shareholders primarily to help them pay income taxes for the current taxable year. On April 10, 2003, AllChem received a notice of assignment from petitioners, in which petitioners expressed their intention that all of the proceeds from any dividend distribution be allocated to the Internal Revenue Service (IRS), and that one-half of any distribution be applied as an "advance payment" toward petitioners' 2002 taxable year and the other half as an "estimated payment" for the first quarter of petitioners' 2003 taxable year. On April 11, 2003, respondent sent AllChem a notice of levy with respect to petitioner Ryals's (Mr. Ryals's) unpaid income tax liabilities for taxable years 1977 and 1978. ¹ Four2006 U.S. Tax Ct. LEXIS 33">*36 days later, on April 15, 2003, AllChem declared a dividend.

On April 15, 2003, petitioners filed a request for an extension of time to file their 2002 tax return and also submitted two payments of $ 11,000 and $ 2,000 to be applied to their 2002 taxable year. Petitioners previously had made, on June 19, 2002, another estimated payment of $ 2,000 to be applied to their 2002 taxable year. Respondent had not determined a deficiency in income tax for petitioners' 2002 taxable year at the time petitioners filed their extension request on April 15, 2003.

On May 9, 2003, respondent received from AllChem two separate checks each in the amount of $ 7,000 that petitioners intended as estimated tax payments for their 2002 and 127 T.C. 178">*180 2003 taxable years. ²2006 U.S. Tax Ct. LEXIS 33">*37 Respondent credited one of the $ 7,000 payments to petitioners' 2002 taxable year. ³

On October 15, 2003, petitioners timely filed their 2002 tax return and reported: A tax liability of $ 23,979, withholding credits of $ 12,694, estimated tax payments of $ 18,000, ⁴2006 U.S. Tax Ct. LEXIS 33">*38 $ 11,000 paid with their request for an extension to file, and an overpayment of $ 17,645 and requested a refund of $ 17,585. ⁵ Pursuant to section 6402(a), respondent credited to Mr. Ryals's 1978 income tax liability $ 10,406.63 of petitioners' claimed overpayment.

Respondent later determined a deficiency in petitioners' income tax of $ 18,481 and a section 6662(a) penalty of $ 3,696 for their 2002 taxable year and sent petitioners a notice of deficiency on March 28, 2005. Petitioners timely petitioned this Court.

At the call of the instant case for trial during the Court's trial session on January 23, 2006, the parties appeared and represented to the Court that the case was settled and filed a stipulation of settled issues. We granted the parties an additional 30 days to submit a decision document. After the trial session, a dispute arose between the parties regarding whether certain payments petitioners intended to be applied to their 2002 taxable year were properly credited to earlier years by respondent. Petitioners refused to sign the decision document prepared by respondent's counsel. The proposed decision document stated that there was a deficiency in petitioners' Federal income tax of $ 18,481 and a section 6662(a)2006 U.S. Tax Ct. LEXIS 33">*39 penalty of $ 1,848. Petitioners contend that respondent improperly credited to Mr. Ryals's 1978 tax liability one 127 T.C. 178">*181 $ 7,000 payment and the two $ 2,000 payments and that those payments should have been applied to petitioners' 2002 taxable year. Petitioners contend that the decision document should reflect the payments as credits against their 2002 tax liability. On February 23, 2006, at the end of the 30-day period, respondent filed the instant motion for entry of a decision in accordance with respondent's proposed decision document. On March 23, 2006, petitioners filed an objection to respondent's motion. The motion was then set for hearing on April 26, 2006.

OPINION

We must decide whether we have jurisdiction to decide whether respondent improperly credited the payments in issue to Mr. Ryals's 1978 tax liability. The Tax Court is a court of limited jurisdiction and may exercise jurisdiction only to the extent expressly authorized by Congress. Naftel v. Commissioner, 85 T.C. 527">85 T.C. 527 (1985). Our deficiency jurisdiction encompasses the redetermination of deficiencies under section 6214(a) and of overpayments, subject to certain limitations, under section 6512(b). Petitioners2006 U.S. Tax Ct. LEXIS 33">*40 raise no overpayment issues within the scope of section 6512(b)(1); therefore our overpayment jurisdiction under section 6512 does not apply. Petitioners contend, however, that the Court has jurisdiction over the proper application of the payments in issue because those payments are included in the calculation of a deficiency and therefore must be included in any decision we enter in the instant case. Respondent contends that the payments in issue are estimated tax payments that are not included in the calculation of a deficiency and that, because there is no question of the correct amount of the deficiency, the Court should grant respondent's motion and enter a decision without the inclusion of those payments.

For purposes of section 6214, deficiencies are defined by section 6211 as follows:

  SEC. 6211. DEFINITION OF A DEFICIENCY.

     (a) In General. -- For purposes of this title in the case

     of income, estate, and gift taxes imposed by subtitles A

     and B and excise taxes imposed by chapters 41, 42, 43, and

     44 the term "deficiency" means the amount by which the tax

     imposed by subtitle A or B, 2006 U.S. Tax Ct. LEXIS 33">*41 or chapter 41, 42, 43, or 44

     exceeds the excess of --

       127 T.C. 178">*182 (1) the sum of

          (A) the amount shown as the tax by the taxpayer

          upon his return, if a return was made by the

          taxpayer and an amount was shown as the tax by

          the taxpayer thereon, plus

          (B) the amounts previously assessed (or collected

          without assessment) as a deficiency, over --

        (2) the amount of rebates, as defined in subsection

        (b)(2), made.

Petitioners contend that the payments in issue fall within the parenthetical language of section 6211(a)(1)(B), "(or collected without assessment)". We disagree. Petitioners' argument ignores the language immediately following the parenthetical phrase; i.e., "as a deficiency". Petitioners contend that they intended the payments in issue to be estimated tax payments for taxable year 2002. At the time petitioners made the payments in issue, they had not even filed their 2002 tax return. Section 6211(b) provides2006 U.S. Tax Ct. LEXIS 33">*42 that, for purposes of that section, the tax imposed by subtitle A and the tax shown on the return "shall both be determined without regard to payment on account of estimated tax". See Mackey v. Commissioner, T.C. Memo 2004-70; Malachinski v. Commissioner, T.C. Memo. 1999-182, affd. 268 F.3d 497">268 F.3d 497 (7th Cir. 2001); see also sec. 301.6211-1(b), Proced. & Admin. Regs. ("Payments on account of estimated income tax * * * shall likewise be disregarded in the determination of a deficiency.").

We therefore conclude that the payments in issue were estimated tax payments and not amounts assessed (or collected without assessment) as a deficiency pursuant to section 6211(a)(1)(B). Accordingly, the payments in issue did not reduce the deficiency in the instant case.

We do not have jurisdiction over the issue of whether respondent improperly credited the payments in issue because respondent credited $ 10,406.63 to Mr. Ryals's 1978 tax liability, pursuant to section 6402(a), after petitioners reported an overpayment of $ 17,645 on their 2002 tax return. This Court does not have jurisdiction to review the credit made by the Commissioner pursuant to section 6402(a)2006 U.S. Tax Ct. LEXIS 33">*43 in the instant case. See sec. 6512(b)(4); Savage v. Commissioner, 112 T.C. 46">112 T.C. 46, 112 T.C. 46">49-51 (1999). ⁶

127 T.C. 178">*183 Because our decision will include a section 6662(a) penalty, we address whether the payments in issue reduce the underpayment on which the penalty is imposed even though the parties did not raise the issue. In Woods v. Commissioner, 91 T.C. 88">91 T.C. 88, 91 T.C. 88">99 (1988), we held that "withholding credits must be subtracted from the 'understatement' to arrive at the 'amount of any underpayment'" in computing the addition to tax under section 6661(a). ⁷

2006 U.S. Tax Ct. LEXIS 33">*44 After our decision in Woods, the Omnibus Budget Reconciliation Act of 1989, Pub. L. 101-239, sec. 7721, 103 Stat. 2395, repealed section 6661 and replaced it with section 6662. Section 6664 was also enacted, defining the term "underpayment". Sections 6662(a) and 6664(a) provide, in pertinent part, as follows:

  SEC. 6662. IMPOSITION OF ACCURACY RELATED PENALTY ON

   UNDERPAYMENTS.

     (a) Imposition of Penalty. -- If this section applies to

     any portion of an underpayment of tax required to be shown

     on a return, there shall be added to the tax an amount

     equal to 20 percent of the portion of the underpayment to

     which this section applies.

* * * * * * *

  SEC. 6664. DEFINITIONS AND SPECIAL RULES.

     (a) Underpayment. -- For purposes of this part, the

     term "underpayment" means the amount by which any tax

     imposed by this title exceeds the excess of --

        (1) the sum of --

          (A) the amount shown as the tax by the taxpayer

          on his return, 2006 U.S. Tax Ct. LEXIS 33">*45 plus

          (B) amounts not so shown previously assessed

          (or collected without assessment), over

        (2) the amount of rebates made. [Emphasis added.]

Section 1.6664-2(d), Income Tax Regs., provides further guidance regarding the phrase "collected without assessment" in section 6664(a)(1)(B):

   (d) Amounts not so shown previously assessed (or collected

   without assessment). * * * For purposes of [defining an

   underpayment for purposes of section 6662], the amount

   "collected without assessment" is the amount by which the total

   of the credits allowable under section 31 (relating to tax

   withheld on wages) * * * estimated tax payments, and

   other 127 T.C. 178">*184 payments in satisfaction of tax liability made before the

   return is filed, exceed the tax shown on the return (provided

   such excess has not been refunded or allowed as a credit to the

   taxpayer). [Emphasis added.]

Thus, section 1.6664-2(d), Income Tax Regs., provides that amounts "collected without assessment" can2006 U.S. Tax Ct. LEXIS 33">*46 include estimated tax payments, but only to the extent those payments, along with withholding or other credits, exceed the tax shown on the return, and only so long as the excess has not been refunded or allowed as a credit to the taxpayer.

As we have found above, respondent first credited the disputed estimated tax payments to petitioners' taxable year 2002. After petitioners reported an overpayment of $ 17,645 on their 2002 tax return, respondent credited $ 10,406.63 of the claimed overpayment to Mr. Ryals's 1978 tax liability pursuant to section 6402(a). ⁸ As stated above this Court does not have jurisdiction to review any credit or reduction made by the Commissioner pursuant to section 6402(a). See sec. 6512(b)(4); 112 T.C. 46">Savage v. Commissioner, supra at 49. Accordingly, we hold that we do not have jurisdiction to decide whether respondent improperly credited the payments in issue to Mr. Ryals's 1978 tax liability.

2006 U.S. Tax Ct. LEXIS 33">*47 To reflect the foregoing,

An appropriate order granting respondent's motion and a decision in accordance with respondent's proposed decision will be entered.