Review and discuss topics focused on how the tax results of an S corporation are allocated among the shareholders. The determination of the nature of the allocated items can dramatically alter the shareholder-level tax consequences. When stock ownership changes during the S corporation's year, a complex set of rules determines the allocation among shareholders. Consider how these rules apply when new stock is issued, redeemed or sold. If there is a mid-year termination of the S-election, the rules that determine the taxable income of the S corporation and C corporation can determine not only the amount of tax but also who bears the tax cost of operating the business. We will discuss these rules and the related tax compliance requirements.