File online- Save paper, save time, start your business online. 1. First, register with the Ohio Secretary of State.Registration information as well as forms are available online(opens in a new window) or at (877) SOS-FILE. Ohio Business Filings Portal. Start or maintain your Ohio business online. Please complete and sign this Registration Form and return within 10 business days. Small Business Resource Hub. Your One-Stop Guide for Navigating Business Taxes and Licensing in Ohio. The firm must be in business for one year.