Massachusetts follows the federal rules concerning rollovers from existing IRAs to Roth IRAs. However, similar to the Massachusetts treatment of IRA distributions, the amount includible on the Massachusetts return by a Massachusetts full-year and/or part-year resident will only include the amounts in excess of the original contributions that were previously taxed by Massachusetts.
Once you've entered your information into the program, Turbotax will figure the amount of taxable rollover.
Please view the Massachusetts link below for more information and to see some example calculations.
http://www.mass.gov/dor/individuals/filing-and-payment-information/guide-to-personal-income-tax/form...
