- 1). Check IRS Form W-2 issued by the company. If you have been an employee of the company you are trying to locate a state EIN for, this number will appear in box 15 of the W-2 form.
- 2). Contact the department of revenue of the state in which the business is operating. The department of revenue operates as the state taxing authority, and issues and retains tax forms for companies operating in the state. The IRS has contact information for each state department of revenue listed in its business database.
- 3). Search the United States Securities and Exchange Commission (SEC) EDGAR database. All public companies file electronic reports with the SEC which may be useful in locating a company's EIN. Many companies list both the federal and state EIN on the first page of Forms 10-K and 20-F. This is also the quickest way to find a federal EIN for states that do not issue unique state EINs.
- 4). Contact the human resources department of the company. The HR department should be able to provide you with the state EIN that is included on Form W-2. However, there may be some smaller companies, such as a sole proprietorship, that use the Social Security number of the owner in place of the state EIN. In this case, it may be difficult to get this information directly.
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