of section 38, in the case of an eligible employer maintaining a qualifying automatic IRA arrangement meeting the requirements of section 408B (without regard to whether the employer is a covered employer), the small employer automatic IRA arrangement credit determined under this section for any taxable year in the credit period is the amount determined under subsection (b). (b) Amount of credit (1) In general The amount of the credit determined under this section for any taxable year with respect to an eligible employer shall be the sum of— (A) $25 multiplied by the number of qualifying employees (within the meaning of section 408B(c)) for whom contributions are made under the qualifying automatic IRA arrangement referred to in subsection (a) for the calendar year in which the taxable year begins, plus (B) the amount determined under paragraph (2) with respect to the taxable year. (2) Amount determined The amount determined under this paragraph is— (A) $500 in the case of the taxable year which begins in the first calendar year in which the eligible employer maintains the qualifying automatic IRA arrangement, (B) $250 in the case of the taxable year which begins in the second calendar year in which the eligible employer maintains such arrangement, and (C) $0 thereafter. (3) Limitation The amount determined under paragraph (1)(A) for any taxable year shall not exceed $250. (4) Coordination with small employer startup credit (A) In general No credit shall be allowed under this section to the employer for any taxable year if a credit is determined under section 45E with respect to the employer for the taxable year. (B) Extension of credit If the eligible employer maintains a qualifying automatic IRA arrangement meeting the requirements of section 408B (without regard to whether the employer is a covered employer) with respect to any of the first 3 calendar years for which the employer could adopt such an arrangement, and subsequently adopts an eligible employer plan for its employees for any of those years which