In the first question, enter your employers Federal Employer Identification Number or FEIN. You can find this number on either your pay stub or in box "b" of your W-2 form. Then, click the "Search" button. If you cannot locate your employers FEIN, select the No FEIN/Skip button. (The "Select Employer" and "Can not Find My Employer" buttons are not active until employer information has been entered.)