@rjs Thank you for the explanation. I moved the sale to Box A, and am now able to display it correctly on Form8949 with code B, and an adjustment in column (g).
I was misled because ChatGPT told me the sale had to be in Box B!
Just to make sure:
If my 1099B reports a basis that matches the transaction history (i.e. "correct") BUT does not add in the paid dividend (i.e. making it overall incorrect), then this sale should be reported in Box A and not Box B?
