How to Find a LLC Tax ID Number
- 1). Check the United States Securities and Exchange Commission (SEC) EDGAR database. Most companies are required to file annual reports with the SEC, including forms 10-K and 20-F. The tax ID number is listed on the first page of these forms.
- 2). Contact the Department of Revenue of the state in which the LLC is registered. The Department of Revenue manages the taxable activity of LLCs, and retains copies of company tax forms. This information can be used to determine the tax ID number for the LLC.
- 3). Look in box 15 of Form W-2 issued by the LLC if you are or have been an employee of the company. LLCs are required by law to include their TIN on the W-2 form for employee tax purposes.
- 4). Contact the company directly. The human resources department should be able to provide you with the tax ID number, or send a copy of a company invoice containing the TIN to you.
- 5). Enlist the help of a private tax ID number locating service such as KnowX. Although you will generally have to pay a fee for this service, it can be worth it for hard-to-find TINs. These services can be useful for finding TINs for single-member LLCs.