@ignoramus wrote:
Turbo Tax does not allow a negative dollar amount in the adjustments.
You don't enter the adjustment amount. The screen in the TurboTax interview tells you to enter the "Actual cost basis," in other words, the correct basis. TurboTax will compare the actual basis that you enter to the incorrect basis that you entered from the 1099-B, and it will put the negative adjustment in column (g) on Form 8949.
