This afternoon, the Massachusetts Department of Revenue promulgated its Final Regulation 830 CMR 63.38.1: Apportionment of Income, to implement the market-based sourcing rules which took effect for tax years beginning after January 1, 2014. The final regulation can be found here: Final Market Sourcing Regulations.
The Final Regulation follows a Working Draft of the same regulation which was released by the Department on March 25, 2014 and a Proposed version of the regulation which was released on October 30, 2014. For a redline of the changes made from the Proposed Regulation to the Final Regulation click the following link: Comparison of Final Market Sourcing Regulations to Proposed Regulations.
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