There's really no way to do that when you tell TurboTax that no 1099-B was received; the programmers just haven't programmed for that.
But that's really not a big deal. All TurboTax does from when you tell TurboTax that you have a 1099-B and want to enter summary information is enter the description "[Broker's Name] - see attached statement" on Form 8949. And the "statement" you send in can be either actually be a Form 8949 if it's available to you or your substitute statement that has the same information.
So if you want, you can add " - see attached statement" to your whatever you choose to enter as the description of what was sold.
