Hi. For ESPP and RSU sales, usually the cost basis on 1099B is wrong and needs to be adjusted . What code for adjustment (B, C, etc) needs to be chosen?

[saeedm]

Usually the adjusted values are reported as a supplemental form from one's brokerage.

[RaifH]

You would want to use adjustment code B. That indicates that the reported basis is incorrect on your 1099-B.