As expected, Massachusetts Governor Deval Patrick this week joined the ranks of chief executives calling for the use of combined reporting of state corporate income taxes to combat tax avoidance by large and profitable companies. Like the Governors of New York, Pennsylvania, and Iowa, Governor Patrick, in his FY2008 budget plan, recommended adopting this approach to corporate taxation, which would require corporations operating in multiple states to report all of their income... including that attributable to subsidiaries. This would negate any tax benefit derived from accounting schemes designed to shift profits out-of-state. A fact sheet from the Massachusetts Budget and Policy Center explains how combined reporting works and why it's needed in the Bay State. While Martin O'Malley has not yet added his name to this growing gubernatorial roster, Maryland legislators this week considered a bill to institute combined reporting in their state. ITEP Executive Director Matt Gardner was among those who testified on the measure.