Common changes include a company name change, a principal business address or mailing address change, adding, removing or replacing a member or manager in an LLC, changing the registered agent or registered office address, and adding or changing the business purpose or activity. Whether a specific change needs a full amendment, a state change form, an annual report update, or only an internal document such as an amended operating agreement depends on your state — we confirm this for you before filing so you do not pay for the wrong filing.