Ohio Rev. Code Ann. § 718.89
(A) In addition to any other penalty imposed by sections 718.80 to 718.95 or Chapter 5703. of the Revised Code, the following penalties shall apply:
(2) If a person required to file a tax return electronically under sections 718.80 to 718.95 of the Revised Code fails to do so, the commissioner may impose a penalty not to exceed the following: