Yes, you still need the details of date acquired and date sold (Box 1c).
Box 5 on Form 1099-B is checked if the proceeds are from a noncovered security.
This does not yet answer the question if the transaction is short term or long term. Form 8949 sorts the transactions six different ways depending on this information. Boxes A, B, and C are for short term, Boxes D,E, and F are for long term.
Where do I enter a 1099-B?
