Since the loss was on preferred stock for a private company with no 1099-B issued, I created a 1099-B entry with "no brokerage statement" for the sales, the choice "not reported to IRS", entered the cost basis(my investment), final value ($0) as the proceeds, and the date of bankruptcy filing as the sales date. I also selected "long-term" as the box F holding period. I filled in no other fields nor selected any boxes for the following screens.
Federal return was accepted.
