The ISO and NQSO are in your w2 but probably not on the 1099-B correct. You will use the amounts in your w2 plus any expenses you may have had to buy or sell the stocks as your cost basis to go with the 1099-B.
If I had to choose between columns, the one labelled tax basis sounds the most reasonable but look at your w2 and forms to determine what is correct.
@pr0
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