Free guide, filing instructions, and forms to file an amendment for LLC certificate of organization with the Texas Department of State. This form is available here for download.How do I form a Corporation or LLC? Contact the office of the Texas Secretary of State. Complete and file the Certificate of Amendment with the Department of State. Amend an Initial Filing​​ Note: Online filing and searching available through SOSDirect. For information or to subscribe, call (512) 475-2703. (1) The name of your business. (2) Street number and street name of your business location. Whatever your reason, completing and filing a simple form with the state is usually all you need to do to amend an LLC's articles of operation.