The documents required for US company registration can vary depending on the type of business entity you are forming and the state in which you are registering. However, some common documents that may be required include: 1. Articles of Incorporation or Articles of Organization: This document outlines the basic details of your company, such as its legal name, purpose, and registered agent. 2. Operating Agreement or Bylaws: This document sets out the internal rules and regulations for your company, including how it will be managed and how decisions will be made. 3. Employer Identification Number (EIN): You will need to obtain an EIN from the Internal Revenue Service (IRS) if you plan to have employees or if your business entity requires one for tax purposes. For more information about EIN and IRS, click here. Employer Identification Number (EIN) . This is a tax identification number that ensures your business is set up to pay taxes, benefit from any deductibles, hire employees, and run other operations.  4. Business Licenses and Permits: Depending on your industry and location, you may need to obtain specific licenses or permits to legally operate your business. 5. Registered Agent Information: A registered agent is a person or entity designated to receive legal and official documents on behalf of your company. You will need to provide their contact information during the registration process. It is important to consult with a legal professional or business advisor for specific guidance on the documents required for registering a company in the United States, as requirements can vary by state and business type.