First, identify the corporate type you wish to form for applicable documents. File online for immediate service!Most transactions are available via the online portal, SilverFlume, and will be processed the same day for no additional charge. Submit Form 2553 to apply for S corp status. Get the information you need to incorporate your business, including information about fees, timelines, how to choose corporate leaders, and more. Fill out and file form 2553 with the following: EIN for your company. Date of incorporation. If you've already formed an LLC or corporation, file Form 2553 with the Internal Revenue Service (IRS) to designate S corp taxation status. Among these important steps are filing formation paperwork with the state, drafting corporate bylaws, and issuing stock for your company.