In my case the stocks that were sold to pay the taxes were on a 1099-B. When I entered the RSU transactions into TT it calculated the gain/loss on each stock sale to put on Schedule D. It's surprising that you didn't get a 1099-B from your broker. I tied out the Schedule D totals from TT to the 1099-B totals and they agreed. If you didn't get a 1099-B I would think you would have to enter the transactions and have TT put them on Schedule D.
