According to the IRS, Instructions for Form 6251 (2021) | Internal Revenue Service (irs.gov) says the amount on Form 6251 2-I should be the DIFFERENCE between the [total fair market value of all the shares] and the [total amount paid for the shares], but TurboTax filled in the SUM of those two values instead. What's going on here?
I filled in the information in TurboTax correctly, the section ISO Exercise and Hold which is under section Investment Income under section Personal Income asked for Date Option Granted (Box 1), Date Option Exercised (Box 2), Price Per Share (Box 3), Fair Market Value (Box 4), Number of Shares Transferred (Box 5), and I filled in word for word what was on my Form 3921. The IRS states Form 6251 2-I should be (Box 4 * Box 5) - (Box 3 * Box 5). TurboTax instead filled it out with (Box 4 * Box 5) + (Box 3 * Box 5).
