Ohio Rev. Code Ann. § 4112.052
(B)
(1) Except as otherwise provided in division (B)(2) of this section, a person may file a civil action under this section alleging an unlawful discriminatory practice relating to employment or a violation of division (A) of section 4112.14 of the Revised Code only if the person satisfies both of the following conditions:
(b) One of the following occurs:
(2) A person may file a civil action under this section alleging an unlawful discriminatory practice relating to employment or a violation of division (A) of section 4112.14 of the Revised Code without satisfying the conditions of division (B)(1) of this section if either of the following apply:
(b) All of the following occur:
(3) With respect to an action described in division (B)(2)(a) of this section, the person may amend the complaint to include damages, but the amendment will relate back to the original filing date of the complaint in the action only after one of the following occurs:
(4) With respect to an unlawful discriminatory practice relating to employment described in division (A)(24)(b) of section 4112.01 of the Revised Code, a charge filed with the Ohio civil rights commission or the equal employment opportunity commission satisfies division (B)(1)(a) or divisions (B)(2)(b)(i) and (ii) of this section if both of the following apply:
(C)
(2) The time period to file a civil action shall be tolled for one of the following periods, as applicable: