Ohio Rev. Code Ann. § 2109.301
(B)
(1) Every administrator and executor, within six months after appointment, shall render a final and distributive account of the administrator's or executor's administration of the estate unless one or more of the following circumstances apply:
(2) In estates of decedents in which the sole legatee, devisee, or heir is also the administrator or executor of the estate, no partial accountings are required. The administrator or executor of an estate of that type shall file a final account or final and distributive account or, in lieu of filing a final account, the administrator or executor may file with the court within thirty days after completing the administration of the estate a certificate of termination of an estate that states all of the following: