@TerryA Boxes 1, 2, and 3 are completely EMPTY!!! Box 16 has entries for A, B, C, D, F, I, J, Q, and U. TurboTax is complaining because D and F are there together. I'm sure the same will happen if E was present with either D or F as well.
Again, this has NOTHING to do with Boxes 1, 2 and 3, as they are completely empty!
