if you filled out the sales section in the k-1 using the 1099-B amounts and also entered the 1099-B as part of the brokerage transactions you have doubled up. The 1099-B is almost certainly incorrect because it does not reflect your proper tax basis. It is computed using the supplemental sales schedule that should have accompanied the K-1.
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the only thing that goes on the Turbotax k-1 sales schedule is any 751 gain reported on the sales schedule. It will also be in box 20AB of the k-1. The 751 amount is entered as both the sales amount and the ordinary income amount. Look closely at that supplemental sales schedule
