Deductions & credits

@Rebecca32  On our test return, we were able to enter ISO information where the exercise price for the option, at the time of exercise, was greater than the FMV of the underlying stock.  In other words, when we exercised the option to purchase the stock, we immediately had an unrealized loss.  In full disclosure, we did indicate on the page that requested purchase information, that we did not receive Form 3921.  Upon indicating that we did not receive a Form 3921, we had the option to enter information about our ISO purchase/exercise.

Here are screenshots of two pages from our test return that contain the information about the ISO exercise, purchase, and subsequent sale.