The application required for incorporating as a Limited Liability Company (LLC) is called the Articles of Incorporation (also referred to as a Certificate of Incorporation). This document contains basic information about the company, its owners, and its directors. Depending on your state of incorporation, there may also be state-level fees or taxes that must be paid.
You also will need to file certain forms to fulfill your federal and state income tax obligations. The forms you need are determined by your business structure. A complete list of the forms each type of entity will need can be found on the SBA website. You can also find state-specific tax obligations there. Some businesses may also require federal or state licenses and permits to operate. You can use the SBA's database to search for licensing requirements by state and business type.
After you've completed the steps described above, your LLC is official. But before you open your doors for business, you need to obtain the licenses and permits that all new businesses must have to operate. These may include a business license (sometimes also referred to as a "tax registration certificate"), a federal employer identification number, a sellers' permit, or a zoning permit. For more on business licenses and permits, see the Licenses & Permits for Your Business area of Nolo's website.
Filing a limited liability company separates your personal assets from those of your business. This prevents you from being financially responsible for debts and liabilities of your business. Even though members are still liable, that liability is limited to the extent of their investments in the business. If, for instance, your company is involved in a lawsuit, the assets of the LLC itself could be in jeopardy, while the personal assets of the members/owners would be protected.
Unltd or Ultd (Unlimited/無限公司): similar to a limited liability company (Ltd) but whose members or shareholders do not benefit from limited liability should the company ever go into formal liquidation. It is not a requirement under company law to add or state the word or designation Unlimited (無限公司) or its abbreviations (Unltd or Ultd) at the ending of its legal company name, and most unlimited companies do not.