Employers in Ohio must conform with these state rules relating to filing income tax withholding returns.
Periodic Returns. Employers required to withhold quarterly or monthly (excluding EFT) file Form IT 941 by January 31 of the succeeding calendar year. Quarterly or monthly payments (excluding EFT) are made on Form IT 501. Employers who remit through EFT must submit Form IT-942 no later than the last day of the month following the end of the calendar quarter. EFT filers are not required to file IT 941.
Annual Reconciliation Returns. All employers required to withhold, file Form IT-3 on or before the last day of February of the succeeding calendar year. Employers required to withhold quarterly or monthly (excluding EFT) file Form IT 941 by January 31 of the succeeding calendar year.