I just read the MA DOR info that you pointed me too and I don't think it answers the question I have. The link you provided only talks about pensions; specifically, state government pensions. I believe a 403B is a federal retirement plan program, similar to 401K but, seems to allow states to include contributions in taxable income, as opposed to how federal reduces taxable income at the time of contributing. Does this MA DOR information also apply to return of 403B contributions that have already been taxed in another state? I am trying to avoid the cost of hiring a CPA for this but, the answers don't seem to be easily found.
