Where to file your taxes for Form 1120-S ; A foreign country or U.S. possession. You can get in-person help at your local IRS Taxpayer Assistance Center.Call for an appointment after you find a Taxpayer Assistance Center near you. An S-Corp election will change your Florida business's tax status with the IRS and alter the manner in which your company pays taxes. Complete the fillable PDF form using your computer. Corporations file Schedule M-3 (Form 1120) to answer questions about their financial statements and reconcile financial statement net income (loss) The Division of Corporations is the State of Florida's official business entity index and commercial activity website. Get your refund status. Give Form to the requester. Do not send to the IRS.