It may be that you need to leave the field as is, that is, re-enter the original amount. Under CA AMT, you must treat stock acquired through the exercise of an incentive stock option as if the option were a non-statutory stock option. You must generally include as an AMT adjustment, the difference between the fair market value of the stock on the exercise date and the option price in the year the option is exercised.
Increase your AMT basis in the stock you acquired from exercising your incentive stock option by the amount of the adjustment. California may allow an AMT credit in a subsequent year.
No AMT adjustment is required if you dispose of the stock in the same year you exercise the option.
@peter1104
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