A Subchapter S Corporation is a general corporation that has elected a special tax status with the IRS after the corporation has been formed. Subchapter S corporations are most appropriate for small business owners and entrepreneurs who prefer to be taxed as if they were still sole proprietors or partners. For many small businesses, the S Corporation offers the best of both worlds, combining the tax advantages of a sole proprietorship or partnership with the limited liability and enduring life of a corporate structure.