Business & farm

Start by looking at the EIC confirmation receipt from the IRS ... what do they expect you to file ?   Do they tell you to file a form 1065 by a certain date ... look in the middle of the first page.   If they expect a 1065 then you need to file a 1065.   

Did you save a copy of the SS-4 form when you applied for the EIN ?   Which boxes did you complete ?  Which entity did you apply for ?