FAQs - Individual Income Tax Preparer Electronic Filing Requirement

Who do I contact if I have questions about the electronic filing program?

You may contact the Ohio Department of Taxation's electronic filing help desk at (614) 466-0197 for questions regarding the federal/state e-file program or any of Ohio’s electronic filing alternatives individual taxpayers.

Business taxes including commercial activity tax (CAT), sales tax and employer withholding, are filed through Ohio Business Gateway.  For assistance with business taxes, please call 888-405-4039.  For assistance with Ohio Business Gateway, please call 866-644-6468.