Thanks so much!
So, I can't just hit exclude, but I'll have to check what's on schedule E where you suggest. The net income (revenue minus expenses) from this rental property is showing as $0 in my federal TurboTax (though I haven't yet checked what that puts into the forms), and it generates $0 of taxable NY income, so I'm bewildered why it's listed as about $15K on my Massachusetts return generated from the same data, and excluding or not makes about $700 difference in my total MA tax due. Though MA will credit me for any tax paid in NY on this NY income, there isn't actually any tax due in NY.
It seems to me, based on everything you're saying, that even though this can't be excluded as a whole, it should show up as $0 net in MA just as it does in federal and NY, so I'll have to find out why it does not look that way on my returns now.
