Maryland State taxes Oversea Military Wages screen poorly worded.

I need assistance figuring out what numbers i need to use to fill out the MARYLAND MILITARY OVERSEAS INCOME WORKSHEET. Turbotax language is confusing and totally inadequate to know what to enter into the field. Federal AGI that is used as MD income already has the non-taxable combat subtracted. That amount is already higher than the allowed $15,000 for MD. Turbotax questions do not make sense as to where to get the correct answer from.