Tax Executives Institute | 12,194 followers on LinkedIn. Connect. Engage. Impact. | Tax Executives Institute is the preeminent association of in-house tax professionals worldwide​. Our members are business executives who are responsible for taxation matters on an administrative or policy-making level, or whose work is otherwise primarily concerned with the challenges of business taxation. TEI members are accountants, lawyers, and other corporate and business employees who are responsible for the tax affairs of their employers in an executive, administrative, or managerial capacity.