of certain benefits The current year parental leave credit for any taxable year (after application of subparagraph (B)) shall be reduced by the amount, if any, in certain benefits as may be otherwise received by an individual for any weeks included under subparagraph (A)(i). For purposes of the preceding sentence, certain benefits include— (i) periodic benefits on account of such individual’s total or partial disability under a workmen’s compensation law or plan of the United States or a State, (ii) periodic benefits on account of an individual’s employment status under an unemployment law or plan of the United States or a State, and (iii) such other benefits as determined under regulations issued by the Secretary. (3) Parental leave credit carryback In the case of an individual who elects not to apply the current year parental leave credit to the taxable year which includes the weeks of parental leave described in subparagraph (A)(i), the amount of such credit— (A) shall be reduced to zero for such taxable year, and (B) shall be a parental leave credit carryback to the preceding taxable year. (b) Determination of credit amount (1) Replacement percentage The replacement percentage shall be the amount, expressed as a percentage, which has been elected by the individual (in such manner and at such time as is prescribed by the Secretary) for each week of parental leave described in paragraph (2)(A)(i) of subsection (a) for purposes of determining the credit allowed under such subsection, provided that— (A) such amount is not less than 40 percent and not greater than 90 percent, and (B) for each week of parental leave described in paragraph (2)(A)(i) of subsection (a), such amount does not result in a credit allowed under such subsection that exceeds— (i) the average weekly wage rate for such individual, minus (ii) any amounts described in paragraph (2)(B)(i)(II) of such subsection which are provided to the individual for such week. (2) Average weekly wage rate The average weekly wage rate shall be an amount equal