State and federal registration is an important step in your business journey. Use the following information to ensure your business is properly registered. Image Applying for an Employer Identification Number Find information about how to apply for an Employer Identification Number (EIN). Image Registering with the South Carolina Secretary of State Some businesses operating in South Carolina must register with the South Carolina Secretary of State. Find information on how to register. Image Using a "Doing Business As" (DBA) name Learn more about how to use a DBA name for your business in South Carolina.