To become an S Corporation, you must know the mechanics of filing for this special tax status. Your first step is to form a general, close or professional corporation in the state of your choice. Second, you must obtain the formal consent of the corporation's shareholders. This consent should be noted in the corporation's minutes. Once the filing is approved, your company must complete Form 2553, Election by a Small Business Corporation. This form must be filed with the appropriate IRS office for your region. Please consult the IRS' instructions for Form 2553 to determine your proper deadline for completing and submitting this form.