He works for US Gov, she works for USO.  Live in Japan.  His is taxable to Maryland.  Hers is Federally excluded due to Foreign Earned Income Exclusion.  Certain states accept the exclusion, others do not.  Online only info is a few tax preparers say yes and others say no.  Called Comptroller of MD Tax Pro Help Line.  Clueless but they said it is not taxable.  I asked for documentation for my files.  They could not give me any.  Does anyone KNOW whether her income is an addition adjustment and taxable in Maryland.