26 U.S.C. § 6011 General requirement of return, statement, or list
(a) General ruleWhen required by regulations prescribed by the Secretary any person made liable for any tax imposed by this title, or with respect to the collection thereof, shall make a return or statement according to the forms and regulations prescribed by the Secretary. Every person required to make a return or statement shall include therein the information required by such forms or regulations.
(b) Identification of taxpayerThe Secretary is authorized to require such information with respect to persons subject to the taxes imposed by chapter 21 or chapter 24 as is necessary or helpful in securing proper identification of such persons.
(c) Returns, etc., of DISCS and former DISCS and former FSC’s(1) Records and informationA DISC, former DISC, or former FSC (as defined in section 922 as in effect before its repeal by the FSC Repeal and Extraterritorial Income Exclusion Act of 2000) shall for the taxable year—(A) furnish such information to persons who were shareholders at any time during such taxable year, and to the Secretary, and (B) keep such records, as may be required by regulations prescribed by the Secretary. (2) ReturnsA DISC shall file for the taxable year such returns as may be prescribed by the Secretary by forms or regulations.
(d) Authority to require information concerning section 912 allowancesThe Secretary may by regulations require any individual who receives allowances which are excluded from gross income under section 912 for any taxable year to include on his return of the taxes imposed by subtitle A for such taxable year such information with respect to the amount and type of such allowances as the Secretary determines to be appropriate.
(e) Regulations requiring returns on magnetic media, etc.(1) In generalThe Secretary shall prescribe regulations providing standards for determining which returns must be filed on magnetic media or in other machine-readable form. Except as provided in paragraph (3), the Secretary may not require returns of any tax imposed by subtitle A on individuals, estates, and trusts to be other than on paper forms supplied by the Secretary. (2) Requirements of regulationsIn prescribing regulations under paragraph (1), the Secretary—(A) shall not require any person to file returns on magnetic media unless such person is required to file at least the applicable number of returns during the calendar year, and (B) shall take into account (among other relevant factors) the ability of the taxpayer to comply at reasonable cost with the requirements of such regulations. (3) Special rule for tax return preparers(A) In generalThe Secretary shall require that any individual income tax return prepared by a tax return preparer be filed on magnetic media if—(i) such return is filed by such tax return preparer, and (ii) such tax return preparer is a specified tax return preparer for the calendar year during which such return is filed. (B) Specified tax return preparerFor purposes of this paragraph, the term “specified tax return preparer” means, with respect to any calendar year, any tax return preparer unless such preparer reasonably expects to file 10 or fewer individual income tax returns during such calendar year. (C) Individual income tax returnFor purposes of this paragraph, the term “individual income tax return” means any return of the tax imposed by subtitle A on individuals, estates, or trusts. (D) Exception for certain preparers located in areas without internet accessThe Secretary may waive the requirement of subparagraph (A) if the Secretary determines, on the basis of an application by the tax return preparer, that the preparer cannot meet such requirement by reason of being located in a geographic area which does not have access to internet service (other than dial-up or satellite service). (4) Special rule for returns filed by financial institutions with respect to withholding on foreign transfersThe numerical limitation under paragraph (2)(A) shall not apply to any return filed by a financial institution (as defined in section 1471(d)(5)) with respect to tax for which such institution is made liable under section 1461 or 1474(a). (5) Applicable number(A) In generalFor purposes of paragraph (2)(A), the applicable number shall be—(i) except as provided in subparagraph (B), in the case of calendar years before 2021, 250, (ii) in the case of calendar year 2021, 100, and (iii) in the case of calendar years after 2021, 10. (B) Special rule for partnerships for 2018, 2019, 2020, and 2021In the case of a partnership, for any calendar year before 2022, the applicable number shall be—(i) in the case of calendar year 2018, 200, (ii) in the case of calendar year 2019, 150, (iii) in the case of calendar year 2020, 100, and (iv) in the case of calendar year 2021, 50. (6) 11 So in original. There are two pars. designated (6). Partnerships required to file on magnetic mediaNotwithstanding paragraph (2)(A), the Secretary shall require partnerships having more than 100 partners to file returns on magnetic media. (6) 1 Application of numerical limitation to returns relating to deferred compensation plansFor purposes of applying the numerical limitation under paragraph (2)(A) to any return required under section 6058, information regarding each plan for which information is provided on such return shall be treated as a separate return. (8) Qualified opportunity funds and qualified rural opportunity fundsNotwithstanding paragraphs (1) and (2), any return filed by a qualified opportunity fund or qualified rural opportunity fund under section 6039K shall be filed on magnetic media or other machine-readable form.
(f) Promotion of electronic filing(1) In generalThe Secretary is authorized to promote the benefits of and encourage the use of electronic tax administration programs, as they become available, through the use of mass communications and other means. (2) IncentivesThe Secretary may implement procedures to provide for the payment of appropriate incentives for electronically filed returns.
(g) Disclosure of reportable transaction to tax-exempt entityAny taxable party to a prohibited tax shelter transaction (as defined in section 4965(e)(1)) shall by statement disclose to any tax-exempt entity (as defined in section 4965(c)) which is a party to such transaction that such transaction is such a prohibited tax shelter transaction.
(h) Mandatory e-filing of unrelated business income tax returnAny organization required to file an annual return under this section which relates to any tax imposed by section 511 shall file such return in electronic form.
(i) Income, estate, and gift taxesFor requirement that returns of income, estate, and gift taxes be made whether or not there is tax liability, see subparts B and C.