I have the same situation converting some funds from my 401K to a ROTH. I have no "non-deductible" amounts involved, Box2a correctly shows the entire box 1 amount. Box 16 is blank on my 1099-R. Entering the financial institution information on the on the "Step-by-step" screen, I left he block 16 blank as on the 1099-R. On the next screen, Turbotax had automatically entered the entire amount in the "New York Distribution Amount". Switching to forms mode, the form looks correct (to me) as the entire amount is taxable in my state.
