In this tax refund ease, we affirm the district court’s ruling that the appellee’s, Mutual Assurance, Inc., amendment to a timely filed administrative claim for refund could serve as the jurisdictional basis for maintaining this action.
*1354 FACTS
Mutual Assurance, Inc. (Mutual Assurance), the appellee, an Alabamа corporation whose principal place of business is located in Birmingham, Alabama, is a property and casualty insurance company specializing in medical malpractice insurance. The Internal Revenue Code allows Mutual Assurance tо determine its taxable income through deductions, including its “losses incurred,” including unpaid loss reserves, from its gross revenues. In 1986, Congress enacted section 846 of the Internal Revenue Code, 26 U.S.C. § 846, which required insurance companies such as Mutual Assurance to discount to present value their unpaid loss reserves attributable to current as well as prior tax years.
In response to problems that arose in the industry, the Internal Revenue Service (IRS) subsequently promulgated Revenue Procedure 91-21 that provided certain insurers the opportunity to elect to use a special schedule of discount factors (the Composite Schedule P factors) to determine their unpaid loss reserves. In the case of Mutual Assurance, the election led to a larger loss reserve, a larger deduction, and a lower tax liability. The relief set forth in Revenue Procedure 91-21 was available for all years for which the statute of limitations on filing refund claims were still open.
Mutual Assurance reports its income taxes on the basis of a calendar year, and the earliest open year was 1987. Mutual Assurance filed its 1987 tax return on September 10, 1988. Section 6511(a) of the Internal Revenue Code (26 U.S.C.) requires a taxpayer to file an administrative claim for refund with the IRS within three years from the time the taxpayer files the return or two years from the time the tax is paid, whichever period. expires later. Therefore, Mutual Assurance had until September 10, 1991, to file a claim for a refund of its 1987 taxes. On April 5, 1991, Mutual Assurance filed claims for refund for its 1987, 1988, and 1989 tax years using Revenue Procedure 91-21 as the basis for the refunds claimed. The amount claimed for 1987 was $495,728. On May 14, 1991, the IRS allowed Mutual Assurance’s claim for the 1987 tax year and refunded to the company $495,728. On September 19, 1991, nine days after the expiration of the three-year period for seeking refunds for tax year 1987, the IRS conducted a field examination of Mutual Assurance’s claims and discovered a miscalculation of the company’s unpaid loss reserves for the 1987, 1988, and 1989 tax years. This miscalculation caused Mutual Assurance to understate the amount of its overpayment in the original claim for a refund for tax year 1987 by $489,601. As a result, in addition to the money alrеady refunded, Mutual Assurance overpaid $489,601.
On September 26, 1991, Mutual Assurance filed an informal claim for refund for each of the three years. The IRS allowed the claims for refund for 1988 and 1989, including the additional amounts claimed in the informal claim of September 26,1991. The IRS disallowed Mutual Assurance’s claim for the additional $489,601 as a result of the 1987 overpayment. On April 23, 1993, Mutual Assurance filed a formal claim for refund for tax year 1987 requesting a refund of $489,601. In letters dated April 29, 1993, and May 6, 1993, the IRS notified Mutual Assurance that it was disallowing both the company’s informal and formal clаim for an additional refund for tax year 1987 due to Mutual Assurance’s failure to timely file an administrative refund claim pursuant to I.R.C. § 6511(a). Mutual Assurance instituted this action on May 12, 1993.
PROCEDURAL HISTORY
On July 16, 1993, the government filed a motion to dismiss the complaint for lack of subject matter jurisdiction. The government relied оn I.R.C. § 7422 that bars an action for recovery of federal taxes unless a claim for refund has been duly filed. The government then invoked I.R.C. § 6511’s three-year period for filing a refund claim and argued that because the only claim filed within the three-year period the IRS allowed, no timely claim could serve as the basis for this action for refund. For that reason, the government argued, the district court lacked jurisdiction over this lawsuit.
In an order dated October 4, 1993, the district court denied the government’s mo *1355 tion. The court ruled that Mutual Assurance’s original refund claim fоr tax year 1987, filed on April 5, 1991, provided a sufficient jurisdictional basis for the refund lawsuit for the $489,601. In rejecting the assertion that Mutual Assurance’s right to a refund of taxes is limited to the amount in its claim for refund, the court concluded that once a taxpayer files a claim for refund, the IRS is rеquired to compute the correct tax. The court therefore concluded that Mutual Assurance’s April 5, 1991 claim for refund was a sufficient basis to allow it to recover the entire amount of its overpayment. Alternatively, the district court found that Mutual Assurance’s informal claim for refund of September 26, 1991, should be viewed as an amendment of, and should relate back to, its timely April 5,1991 claim even though Mutual Assurance’s earlier claim had already been allowed in full. The court reasoned that Mutual Assurance’s amendment altering the amount of recovery was based on the same grounds as the original claim.
Because the government’s sole defense to the relief sought by Mutual Assurance was stated in its motion to dismiss, the parties stipulated to the entry of final judgment in Mutual Assurance’s favor. Pursuant to that stipulation, the district сourt entered judgment on May 11, 1994. The government appeals.
CONTENTIONS
The government contends that once it allowed Mutual Assurance’s April 5, 1991 request for a $495,728 refund for tax year 1987, that claim was rendered moot; and nothing more was pending before the IRS with respect to tax year 1987. Thеrefore, at the time the statute of limitations expired on September 10,1991, an administrative refund claim that could serve as the jurisdictional basis for a refund suit did not exist. The government also argues that the district court’s alternative holding is contrary to a long line of cases holding that once a refund claim has been satisfied, it can no longer be amended.
Mutual Assurance argues that the district court’s judgment should be affirmed because its April 5, 1991 refund claim provided the IRS with sufficient notice to grant relief in the correct amount. Mutual Assurance also argues, alternatively, that it was entitled to amend the original claim to state the correct amount.
ISSUE
The sole issue raised on this appeal is whether Mutual Assurance’s April 5, 1991 timely filed refund claim for the 1987 tax year may be amended after the expiration of the statute оf limitations because the amount the government refunded was less than the full amount of the overpayment.
DISCUSSION
The subject matter jurisdiction of the district court is a question of law subject to
de novo
review.
United States v. Perez,
The United States has waived its sovereign immunity in order to allow taxpayers to file actions seeking tax refunds: “The district courts shall have original jurisdiction ... of [a]ny civil action against the United States for the recovery of any internal-revenue tax alleged to have been erroneously or illegally assessеd or collected....” 28 U.S.C. § 1346(a)(1). Section 7422 of the Internal Revenue Code (26 U.S.C.) provides, however, that a suit for a refund of federal taxes may be maintained only if an administrative claim for refund has been “duly
*1356
filed.”
1
Courts have consistently held that a taxpayer’s filing of an administrative refund claim with the IRS in accordance with the relevant provisions of the Internal Revenue Code is a jurisdictional prerequisite to the maintenance of a tax refund suit.
E.g., Dalm,
The government argues that once it satisfied Mutual Assurance’s timely filed, April 5, 1991 refund claim for tax year 1987 and paid the amount requested, Mutual Assurance no longer had an administrative refund claim for tax year 1987 pending before the IRS. Therefore, when Mutual Assurance filed an amended claim for refund on September 26, 1991, beyond the three-year period for filing refund claims for tax year 1987, no refund claim existed that could be amended. The government finds support for this proposition in a line of cases holding that an accepted claim is no longer in existence and is, therefore, not a basis for filing an amended claim.
E.g., Edwards v. Malley,
In
Bemis Brothers Bag Co. v. United States,
In allowing the amendment, the Court reasoned that the taxpayer had not set forth a new theory of recovery; rather, the taxpayer was merely “asking the Commissioner take action uрon discoveries already in the making or perhaps already made.”
Bemis Brothers,
The government relies on a decision of the United States Court of Claims in
Union Pacific Railroad Co. v. United States,
The government also cites
Tobin v. Tomlinson,
CONCLUSION
Accordingly, the judgment of the district court is affirmed.
AFFIRMED.
Notes
. Section 7422 provides, in relevant part:
(a) .... No suit or proceeding shall be maintained in any court for the recovery of any internal revenue tax alleged to have bеen erroneously or illegally assessed or collected ... until a claim for refund or credit has been duly filed with the Secretary, according to the provisions of law in that regard, and the regulations of the Secretary established in pursuance thereof.
I.R.C. § 7422(a).
. During oral argumеnt, the government conceded that Mutual Assurance’s April 5, 1991 claim for refund provided it with a sufficient basis for accurately computing the exact amount of the 1987 overpayment.
. Decisions of the United States Court of Appeals for the Fifth Circuit handed down prior to the close of business on September 30, 1981, are binding precedent on the Eleventh Circuit.
Bonner v. City of Prichard,
