Forms 355 and 355S
Business corporations with taxable years ending in the same month as the taxable year for which the combined report is being filed will pay the non-income measure of excise tax as part of the combined report.
A business corporation will only file a separate Form 355 or 355S to calculate its non-income measure of excise tax if its year ends at a different time than the common year used to determine the combined group’s income. A Massachusetts S corporation that's included in Form 355U will continue to file Form 355S, but that return will be informational and will include Schedules S and SK-1.
