; and (II) the term poverty guideline for 2018 means the annual poverty guideline for 2018 (as updated annually in the Federal Register by the Department of Health and Human Services under the authority of section 673(2) of the Omnibus Budget Reconciliation Act of 1981) as applicable to a single individual. . (b) Recomputation Notwithstanding section 215(f)(1) of the Social Security Act, the Commissioner of Social Security shall recompute primary insurance amounts originally computed for months prior to November 2018 to the extent necessary to carry out the amendments made by this section. (c) Conforming amendment Section 209(k)(1) of such Act ( 42 U.S.C. 409(k)(1) ) is amended by inserting 215(a)(1)(E), after 215(a)(1)(D), . 104. Increase in threshold amounts and rate for inclusion of Social Security benefits in income (a) In general Subsection (a) of section 86 of the Internal Revenue Code of 1986 is amended to read as follows: (a) In general Gross income for the taxable year of any taxpayer described in subsection (b) (notwithstanding section 207 of the Social Security Act) includes Social Security benefits in an amount equal to the lesser of— (1) 85 percent of the Social Security benefits received during the taxable year, or (2) one-half of the excess described in subsection (b)(1). . (b) Base amount Subsection (c) of section 86 of such Code is amended to read as follows: (c) Base amount For purposes of this section, the term base amount means— (1) except as otherwise provided in this paragraph, $50,000, (2) $100,000 in the case of a joint return, and (3) zero in the case of a taxpayer who— (A) is married as of the close of the taxable year (within the meaning of section 7703) but does not file a joint return for such year, and (B) does not live apart from his spouse at all times during the taxable year. . (c) Hospital Insurance Trust Fund held harmless Section 121(e)(1) of the Social Security Amendments of 1986 ( 42 U.S.C. 401 note) is amended by adding at the end the following new subparagraph: (C) The