The AMT adjustment for shares exercised but not sold is shown on line 2j and is (# of ISO shares exercised in a year but not sold by the end of the year) x (per share FMV at exercise - per share price paid to exercise). Obviously if you exercised multiple grants during a year you'd have to do this calculation for each grant and add them up.
Within TurboTax the only place that number comes from, unless you enter something directly on the Form it self, is the "ISO Exercise and Hold" interview and the "Stocks, Mutual Funds, Bonds, Other" interview if you choose to use the ISO "Guide me" process.
First, make your own calculation of what the number on line 2j should be. If it's wrong and you have no entries in the "ISO Exercise and Hold" interview then you've made a mistake in the "Stocks, Mutual Funds, Bonds, Other" interview. If it happened that you exercised an ISO and then sold some of those shares piecemeal, you can't keep telling TurboTax abount the SAME exercise each time. TurboTax can't "know" that your referring to the same exercise, it sees them as multiple exercises. In that case break the exercise into smaller "exercises"; as long as the TOTAL Box 5 amounts add up to the entire grant amount, TurboTax will calculate the adjustment correctly.
