The amount showing in TurboTax as "Income from Non-Taxing State" is not my income attributable to my working days in New Hampshire (which is 60% of my income). It is the difference between my federal taxable wages in Box 1 of my W2 and my State Wages in Box 16. That difference is only about 10% of my wages - I don't know why my state wages are different from my federal wages, but TurboTax created those two income buckets *before* I got to the working days apportionment screen.
But, as you say, it appears that one can't e-file the MA non-resident form. Strange - I did it last year and the year before, through TurboTax.
