When an LLC elects S status, it is imperative that its operating agreement and other documents conform to the S corporation eligibility requirements. Paying income tax as an S-corporation begins similarly to the other LLC entity types.In this tax status, you are still considered a pass-through entity. Complete the form, including information such as the corporation's name, Employer Identification Number (EIN), date and state of incorporation, and tax year. Before you can elect for S Corp taxation, you need to have a legal structure in place. This could be an LLC or a corporation. IRS Form 2553, Sub Chapter S Corporation Election application preparation and filing service is available. Search for a business entity, reserve a name, print a Certificate of Good Standing, and more. File an Annual Report File an annual report for a Corporation. You must register your business entity with the proper government agency, once the most appropriate business entity is determined.