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I did exactly what you suggested and the problem has always been the same.
It should be very easy for you to reproduce the problem by entering the following two lines in W2. Put in some number for Box 16 for both rows, they should be the same. MA state tax return will add both up, instead of only importing one.
I am a software architect. This is a Turbo tax bug. Please report it to IT and have someone fix it.
