just to add, I see the AMD "D" code you are referring to on the sales total screen and both ways of doing seem to create an 8949 with code D, but doing it as sales summary method (with negative amount as the adjustment is to gain/loss to bring it to zero) doesn't seem to flip it Schedule B, as you've noticed. Also any adjustment made to a summary total will trigger TT to tell you to mail paper statement to the IRS.
Anyway - last year I had a note with AMD and put it in as "one by one" which worked fine, it will generate Form 8949 with the code D and adjustment of gain/loss; and didn't need to mail anything to IRS (I do this for any wash sales also).
