1099B Box 1b and 1e empty for my Company RSU sales

I sold three batches of company RSUs with different vested dates. My 1099-B reports these sales in one transaction, with Boxes 1b and 1e, and Box 2  blank, and an "X" check for "Applicable check box on Form 8949". Also Box 5 has an "x".  Turbotax tells me I must enter a date in Boxes 1b and a number in Box 1e. How should I do this? Thanks a lot.