To start a small business in Ohio, you will need to take the following legal steps:

1. Choose a business entity: The first step in starting a small business in Ohio is choosing a business entity. This can be a sole proprietorship, partnership, limited liability company (LLC), or corporation. Each type of entity has its advantages and disadvantages, so it is important to choose the right one for your business.
2. Register your business: Once you have decided on a business entity, you will need to register your business with the Ohio Secretary of State. This involves choosing a business name, filing articles of incorporation or organization, and paying the necessary fees.
3. Obtain necessary licenses and permits: Depending on the nature of your business, you may need to obtain certain licenses and permits from the state or local government. This may include a business license, professional license, or special permit.
4. Obtain a tax ID number: You will need to obtain a tax identification number (TIN) from the Internal Revenue Service (IRS) in order to pay federal taxes and hire employees.
5. Obtain insurance: Depending on the nature of your business, you may need to obtain certain insurance policies, such as liability insurance, workers' compensation insurance, or property insurance.
6. Open a business bank account: It is important to keep your personal and business finances separate, so you should open a business bank account for your small business.
7. Comply with all relevant laws and regulations: As a small business owner in Ohio, you will need to comply with all relevant laws and regulations, such as labor laws, tax laws, and environmental regulations.

Some potential limitations or exceptions to this advice may include the need for additional permits or licenses depending on the industry, as well as any zoning or land use regulations that may apply. It is important to consult with a licensed attorney or professional for specific legal advice related to your small business in Ohio.