(C) If any of the facts, figures, computations, or attachments required in a qualifying entity's annual report to determine the taxes imposed by section 5733.41 or 5747.41 of the Revised Code must be altered as the result of an adjustment to the qualifying entity's federal income tax return, whether the adjustment is initiated by the qualifying entity or the internal revenue service, and such alteration affects the qualifying entity's tax liability under one or both of those sections, the qualifying entity shall file an amended report with the tax commissioner in such form as the commissioner requires. The amended report shall be filed not later than one year after the adjustment has been agreed to or finally determined for federal income tax purposes or any federal income tax deficiency or refund, or the abatement or credit resulting therefrom, has been assessed or paid, whichever occurs first.

1. (1) In the case of an underpayment, the amended report shall be accompanied by payment of an additional tax and interest due and is a report subject to assessment under section 5747.13 of the Revised Code for the purpose of assessing any additional tax due under this division, together with any applicable penalty and interest. It shall not reopen those facts, figures, computations, or attachments from a previously filed report no longer subject to assessment that are not affected, either directly or indirectly, by the adjustment to the qualifying entity's federal income tax return.
2. (2) In the case of an overpayment, an application for refund may be filed under this division within the one-year period prescribed for filing the amended report even if it is filed beyond the period prescribed in division (B) of section 5747.11 of the Revised Code if it otherwise conforms to the requirements of that section. An application filed under this division shall claim refund of overpayments resulting from alterations to only those facts, figures, computations, or attachments required in the qualifying entity's annual report that are affected, either directly or indirectly, by the adjustment to the qualifying entity's federal income tax return unless it is also filed within the time prescribed in division (B) of section 5747.11 of the Revised Code. It shall not reopen those facts, figures, computations, or attachments that are not affected, either directly or indirectly, by the adjustment to the qualifying entity's federal income tax return.