MEMORANDUM OPINION

SWIFT, Judge: By statutory notice of deficiency mailed November 2, 1982, respondent determined deficiencies in petitioner's Federal income tax liabilities and additions to tax as follows:

The only issue1984 Tax Ct. Memo LEXIS 244">*246 for decision is whether the tax liabilities and additions to tax determined by respondent are to be computed on a joint return basis or on a separate return basis. This case was submitted fully stipulated pursuant to Rule 122, Tax Court Rules of Practice and Procedure.¹ The stipulation of facts and attached exhibits are incorporated herein by this reference. The pertinent facts are summarized below.

Petitioner resided in Monte Vista, Colorado, at the time the petition herein was filed. Petitioner did not file Federal income tax returns for the years 1977 through 1981 prior to the mailing of the notice of deficiency on November 2, 1982. The deficiencies determined for years 1977 through 1981 were calculated on the basis of rates applicable to a married person filing a separate return. Petitioner thereafter timely filed the petition herein on January 5, 1983. On August 16, 1983, upon advice of counsel, petitioner filed tax returns for the years 1977 through 1981 with the Internal1984 Tax Ct. Memo LEXIS 244">*247 Revenue Service Appeals Division in Denver, Colorado. Petitioner joined with his wife, Barbara A. Smalldridge, in filing those returns on the basis of married persons filing jointly. ²

On August 29, 1983, petitioner filed with this Court a Motion to Amend Petition, which was granted on September 6, 1983. The amended petition alleged that respondent's calculation of tax deficiencies on the basis of a married person filing separately was erroneous.All other allegations of error set forth in the amended petition, including the additions to tax, have been conceded by petitioner. The only issue for decision, therefore, is whether respondent must redetermine petitioner's tax liabilities and additions to tax on a joint return basis.

Section 6013(b)(1) explicitly provides that where a taxpayer originally filed a separate return, a joint return can thereafter be filed by a husband and wife. In the event, however, a notice of deficiency1984 Tax Ct. Memo LEXIS 244">*248 is mailed to one of the spouses, and that spouse files a petition with this Court in response thereto, an election to file a joint return cannot be made after the notice of deficiency was mailed. ³ Section 6013(b)(2)(C) ⁴.

Where a tax return is not timely filed by a taxpayer, and the Commissioner is required to make the joint or separate return election for the taxpayer in a notice of deficiency, that election may not thereafter be altered if the taxpayer files a petition with respect to the notice of deficiency with this Court. As stated previously by this Court--

the administrative considerations which accompany a system such1984 Tax Ct. Memo LEXIS 244">*249 as ours, where taxation is based upon voluntary disclosure, demand that where, "as the result of a failure to file a return, the Commissioner has been required to make an election for the taxpayers * * * that election may not thereafter be altered."

Durovic v. Commissioner,54 T.C. 1364">54 T.C. 1364, 54 T.C. 1364">1402 (1970), affd. on this issue, revd. in part 487 F.2d 36">487 F.2d 36, 487 F.2d 36">41-42 (7th Cir. 1973), cert. denied 417 U.S. 919">417 U.S. 919 (1974), quoting Spanos v. United States,212 F. Supp. 861">212 F. Supp. 861, 212 F. Supp. 861">864 (D. Md. 1963), reversed in part by 323 F.2d 108">323 F.2d 108 (4th Cir. 1963), but affirmed on this issue. ⁵

1984 Tax Ct. Memo LEXIS 244">*250 Petitioner asserts that by accepting his amended petition, this Court allowed petitioner's wife, Barbara A. Smalldridge, to be "joined" as co-petitioner and that this fact is dispositive of the joint return issue. Petitioner also argues that his election to file tax returns jointly with his wife for the year prior to those in controversy (namely, 1976) and for the year following those in controversy (1982), is continuous and effective for the years 1977 through 1981 unless revoked by petitioner and that such an election cannot be terminated by respondent simply because petitioner failed to file timely tax returns for those years.

We agree with respondent. The granting of petitioner's motion to amend is in no way dispositive of the substantive issues raised therein. Moreover, the language of the amended petition does not even purport to "join" Barbara A. Smalldridge as a co-petitioner. It merely alleges that respondent erred in failing to base his calculations of petitioner's tax liabilities on a joint filing status, which allegation of error respondent denied in his Answer.

It is immaterial that petitioner filed joint Federal income tax returns in years prior to or subsequent1984 Tax Ct. Memo LEXIS 244">*251 to those in controversy or that respondent had knowledge with respect thereto. ⁶ Petitioner did not file joint Federal income tax returns for the years in controversy prior to the mailing of the notice of deficiency and petitioner did file a petition with respect to such notice. We therefore hold for respondent, pursuant to section 6013(b)(2)(C).

To reflect the foregoing, Decision will be entered for the respondent.