Massachusetts recently joined a handful of other states (read: States over the Edge and Testing Boundaries with Business Activity Tax Nexus) by issuing a final revised regulation adopting a bright-line, $500,000, nexus threshold for its corporate excise tax. See generally 830 CMR 63.39.1. Echoing the language of the Wayfair decision, the state’s revised nexus regulation provides that “the Commissioner will presume that a general business corporation’s virtual and economic contacts subject the corporation to the tax jurisdiction of Massachusetts under M.G.L. c. 63, § 39, where the volume of the corporation’s Massachusetts sales for the taxable year exceeds five hundred thousand dollars.” 830 CMR 63.39.1(3)(d).