Ok, by process of elimination, I now see what screen you are on. I was using the I'll enter one sale at a time option, but you are entering it under I'll enter a summary for each sales category. It is easier to input there if you have multiple sales so you do not have to write them all out. However, if you are using the summary sales, you will have to include a copy of your Form 1099-B with your tax return to the IRS that shows every individual transaction. TurboTax will prompt you to include a pdf of your 1099-B.
On your screen, enter total proceeds and cost basis as reported on your 1099-B. Enter the adjustment as a negative number in the Total adjustments to gain/loss field. In the second field, put adjustment code B. The adjusted cost basis should be in the supplemental information provided by your broker or on your W-2.
