I did choose that "combination of things" answer. I then entered the $150k as a Roth CONVERSION. After submitting my question, I wen to the underlying form in T-Tax (sorry, don't know which one) and found that there was a box checked indicating that that the distribution was coming FROM another Roth. This was clearly in error and I don't understand why the box was checked. When I unchecked it, my tax due went from refund to quite a bit of tax due - which is what I originally expected.
