; and (B) in subsection (d)— (i) by striking (d) Employee and wages .—The term and inserting the following: (d) Rules and definitions (1) Employee and wages The term ; and (ii) by adding at the end the following: (2) Applicable percentage of net earnings from self-employment in determining taxable self-employment income For purposes of subsection (b)(1), the applicable percentage for a taxable year beginning in any calendar year referred to in such paragraph shall be determined in accordance with the following table: The applicable In the case of: percentage is: Calendar year 2019 90 percent Calendar year 2020 80 percent Calendar year 2021 70 percent Calendar year 2022 60 percent Calendar year 2023 50 percent Calendar year 2024 40 percent Calendar year 2025 30 percent Calendar year 2026 20 percent Calendar year 2027 10 percent Calendar years after 2028 0 percent. . (2) Amendments to the Social Security Act Section 211 of the Social Security Act ( 42 U.S.C. 411 ) is amended— (A) in subsection (b)— (i) in paragraph (1)(I)— (I) by striking or after the semicolon; and (II) by inserting and before 2019 after 1974 ; (ii) by redesignating paragraph (2) as paragraph (3); and (iii) by inserting after paragraph (1) the following: (2) For any taxable year beginning in any calendar year after 2018, an amount equal to the applicable percentage (as determined under subsection (l)) of that part of net earnings from self-employment which is in excess of the difference (not to be less than zero) between— (A) an amount equal to the contribution and benefit base (as determined under section 230) that is effective for such calendar year, and (B) the amount of the wages paid to such individual during such taxable year; or