Also have this question and am unsure how to proceed. Married/Filing separately in mass on both state and federal returns. Easy numbers for example: My income (100k) wife income (100k). The statement in Turbotax reads "Since your total income from your federal return of 200k exceeds you MA and non-MA income on your MA return of 100k by more than 10%, the state requires an explanation of the difference". The difference is because they are (incorrectly?) adding both incomes together. Not sure how to answer this because it seems so obvious, but I can't find any info on this online other than this thread.
