; and (D) by adding at the end the following new subparagraph: (C) Exceptions Notwithstanding subparagraph (A), the Secretary shall require returns or reports required under— (i) sections 6057, 6058, and 6059, and (ii) sections 408(i), 6041, and 6047 to the extent such return or report relates to the tax treatment of a distribution from a plan, account, contract, or annuity, to be filed on magnetic media, but only with respect to persons who are required to file at least 50 returns during the calendar year which includes the first day of the plan year to which such returns or reports relate. . (2) Effective date The amendments made by this subsection shall apply to returns and reports relating to years beginning after the second December 31 occurring after the date of the enactment of this Act. (f) Safeguarding participant privacy and security In establishing the Retirement Savings Lost and Found under subsection (a), the Commissioner of Social Security and the Secretary of the Treasury shall take all necessary and proper precautions, including consulting with the Secretary of Health and Human Services, to ensure that individuals' plan information maintained by the Retirement Savings Lost and Found is protected and that persons other than the individual cannot fraudulently claim the benefits to which any individual is entitled, and to allow any individual to opt out of inclusion in the Lost and Found at the election of the individual. (g) Conforming amendment Subparagraph (B) of section 6103(l)(1) of the Internal Revenue Code of 1986 is amended by striking responsibility under section 1131 of the Social Security Act and inserting responsibilities under section 1131 of the Social Security Act and section 2(a)(1) of the Retirement Savings Lost and Found Act of 2018 . (h) Authorization of appropriations There are authorized to be appropriated such sums as may be necessary to carry out the purposes of this section. 3. Mandatory transfers of rollover distributions (a) Investment options (1) In general Subparagraph (B)