I am also in Maryland I just found the same issue. With this new tax law - Turbotax needs to be able to file a standard deduction for the federal return and check to see which deduction will achieve the the best return.
I made a copy of my TurboTax file and I'm debating filing the "standard deduction" copy just for federal and the "itemized deduction" copy just for Maryland. Is that an acceptable work-around to the issue?
