26 USC 6013 - Joint returns of income tax by husband and wife
A husband and wife may make a single return jointly of income taxes under subtitle A, even though one of the spouses has neither gross income nor deductions, except as provided below:
Except as provided in paragraph (2), if an individual has filed a separate return for a taxable year for which a joint return could have been made by him and his spouse under subsection (a) and the time prescribed by law for filing the return for such taxable year has expired, such individual and his spouse may nevertheless make a joint return for such taxable year. A joint return filed by the husband and wife under this subsection shall constitute the return of the husband and wife for such taxable year, and all payments, credits, refunds, or other repayments made or allowed with respect to the separate return of either spouse for such taxable year shall be taken into account in determining the extent to which the tax based upon the joint return has been paid. If a joint return is made under this subsection, any election (other than the election to file a separate return) made by either spouse in his separate return for such taxable year with respect to the treatment of any income, deduction, or credit of such spouse shall not be changed in the making of the joint return where such election would have been irrevocable if the joint return had not been made. If a joint return is made under this subsection after the death of either spouse, such return with respect to the decedent can be made only by his executor or administrator.
The election provided for in paragraph (1) may not be made
For purposes of section 6501 (relating to periods of limitations on assessment and collection), and for purposes of section 6651 (relating to delinquent returns), a joint return made under this subsection shall be deemed to have been filed
For purposes of this subparagraph, the term exemption amount has the meaning given to such term by section 151 (d). For purposes of clauses (ii) and (iii), if the spouse whose gross income is being compared to the exemption amount is 65 or over, such clauses shall be applied by substituting the sum of the exemption amount and the additional standard deduction under section 63 (c)(2) by reason of section 63 (f)(1)(A) for the exemption amount.
For purposes of section 6511, a joint return made under this subsection shall be deemed to have been filed on the last date prescribed by law for filing the return for such taxable year (determined without regard to any extension of time granted to either spouse).
If a joint return is made under this subsection, the periods of limitations provided in sections 6501 and 6502 on the making of assessments and the beginning of levy or a proceeding in court for collection shall with respect to such return include one year immediately after the date of the filing of such joint return (computed without regard to the provisions of paragraph (3)).
For purposes of part II of subchapter A of chapter 68, where the sum of the amounts shown as tax on the separate returns of each spouse is less than the amount shown as tax on the joint return made under this subsection
For purposes of section 7206 (1) and (2) and section 7207 (relating to criminal penalties in the case of fraudulent returns) the term return includes a separate return filed by a spouse with respect to a taxable year for which a joint return is made under this subsection after the filing of such separate return.
For purposes of sections 15, 443, and 7851 (a)(1)(A), where the husband and wife have different taxable years because of the death of either spouse, the joint return shall be treated as if the taxable years of both spouses ended on the date of the closing of the surviving spouses taxable year.
For purposes of this section
For purposes of this section and subtitle A
If
then such spouse may elect under subsection (a) to file a joint return for such taxable year. With respect to service in the combat zone designated for purposes of the Vietnam conflict, such election may be made for any taxable year while an individual is in missing status.
If the spouse of an individual described in paragraph (1)(A) elects to file a joint return under subsection (a) for a taxable year, then, until such election is revoked
For purposes of this subsection
An election described in this subsection with respect to any taxable year may be made by filing a joint return in accordance with subsection (a) and under such regulations as may be prescribed by the Secretary. Such an election may be revoked by either spouse on or before the due date (including extensions) for such taxable year, and, in the case of an executor or administrator, may be revoked by disaffirming as provided in the last sentence of subsection (a)(3).
A nonresident alien individual with respect to whom this subsection is in effect for the taxable year shall be treated as a resident of the United States
This subsection shall be in effect with respect to any individual who, at the close of the taxable year for which an election under this subsection was made, was a nonresident alien individual married to a citizen or resident of the United States, if both of them made such election to have the benefits of this subsection apply to them.
An election under this subsection shall apply to the taxable year for which made and to all subsequent taxable years until terminated under paragraph (4) or (5); except that any such election shall not apply for any taxable year if neither spouse is a citizen or resident of the United States at any time during such year.
An election under this subsection shall terminate at the earliest of the following times:
If either taxpayer revokes the election, as of the first taxable year for which the last day prescribed by law for filing the return of tax under chapter 1 has not yet occurred.
In the case of the death of either spouse, as of the beginning of the first taxable year of the spouse who survives following the taxable year in which such death occurred; except that if the spouse who survives is a citizen or resident of the United States who is a surviving spouse entitled to the benefits of section 2, the time provided by this subparagraph shall be as of the close of the last taxable year for which such individual is entitled to the benefits of section 2.
In the case of the legal separation of the couple under a decree of divorce or of separate maintenance, as of the beginning of the taxable year in which such legal separation occurs.
At the time provided in paragraph (5).
The Secretary may terminate any election under this subsection for any taxable year if he determines that either spouse has failed
as may be reasonably necessary to ascertain the amount of liability for taxes under chapter 1 of either spouse for such taxable year.
If any election under this subsection for any two individuals is terminated under paragraph (4) or (5) for any taxable year, such two individuals shall be ineligible to make an election under this subsection for any subsequent taxable year.
If
then the individual referred to in subparagraph (A) shall be treated as a resident of the United States for purposes of chapter 1 for all of such taxable year, and for purposes of chapter 24 (relating to wage withholding) for payments of wages made during such taxable year.
If any election under this subsection applies for any 2 individuals for any taxable year, such 2 individuals shall be ineligible to make an election under this subsection for any subsequent taxable year.