Form a corporation, limited liability company (LLCs), limited partnership or more and do business in New York State. Where to file your taxes for Form 1120-S ; A foreign country or U.S. possession.In this video I'm going to teach you how to complete a w-9 no matter how you are tacked. To become an S Corp, the corporation must then file what is known as an "S Election"—Form 2553—with the Internal Revenue Service ("IRS"). This is the easiest way to electronically fill out the forms and prevent losing any information that you've entered. For more information on how to fill out forms and applications please visit Frequently Asked Questions or contact Human Relations team at (313) 224-5021.