Ohio Rev. Code § 5727.08
On or before the first day of March, annually, each public utility and interexchange telecommunications company, and, for tax years 2009 and thereafter, each public utility property lessor, shall file a report with the tax commissioner, on a form prescribed by the tax commissioner. The report shall include such information as the tax commissioner requires to enable the tax commissioner to make any assessment or apportionment required under this chapter.
The report shall be signed by either the owner of the public utility, interexchange telecommunications company, or public utility property lessor or the president, secretary, treasurer, or another duly authorized person.
If such a public utility, interexchange telecommunications company, or lessor fails to file the report on or before the first day of March, or the date it is due under an extension allowed pursuant to section 5727.48 of the Revised Code, or fails to accurately report all taxable property, the tax commissioner may impose a penalty of up to fifty per cent of the taxable value of the property that was not timely or accurately reported. However, if such a public utility, company, or lessor files, within sixty days after the first day of March or the extended due date, the report or an amended report and discloses all items of taxable property that are required by this chapter to be reported, the penalty shall not be more than five per cent of the taxable value that was not timely or accurately reported. The penalty shall be added to and considered a part of the total taxable value of the property that was not timely or accurately reported, and may be abated in whole or in part by the tax commissioner pursuant to a petition for reassessment filed under section 5727.47 of the Revised Code.
R.C. §5727.08