A Taxpayer Identification Number is an identification number used by the Internal Revenue Service in the administration of tax laws. It is also known as an Employer Identification Number (“EIN”). An EIN is used for business purposes the way a social security number is used for individuals. An EIN allows you to identify your business on state and federal government forms. You will need to obtain an EIN if: – You have employees – Your business is a corporation or a partnership – You withhold taxes on income, and you file for employment, excise or alcohol, tobacco and firearm taxes – You want to open a bank account in a corporate or other non-individual name.