@AP44 wrote:
In general, I know I can fill out form 8949 with adjustment code B (incorrect basis), but I want to confirm if this can be done here.
Yes, you can use adjustment code B on Form 8949 in TurboTax. After you enter the basic information about the sale from the 1099-B, a few screens later you will come to a screen that says "Select any less common adjustments that apply." One of the choices is "The cost basis on my statement is incorrect." When you check that box it will let you enter the corrected basis. It will then put the adjustment on Form 8949 with code B.
