Formation of Business Entities and Nonprofit Corporations Under the Texas Business Organizations Code: Online filing available through SOSDirect. Yes. Certificates of formation can be filed online through SOSDirect 24 hours a day, 7 days a week.You need to file a Certificate of Formation to incorporate your business in Texas. You file the Certificate of Formation with the Texas Secretary of State. Jesse S. Romero, CPA, P.C. is a Dallas CPA firm providing incorporation services to form LLCs, LLPs, C Corporations and S Corporations. Learn how to form a Texas corporation with our detailed guide to incorporation. The Small Business Handbook provides a comprehensive overview of business planning, registration, requirements and financing. Establish a business anywhere in the Dallas Fort Worth area with our helpful free guide. All the tools, forms, and links you need are here in one spot.