Get your taxes done using TurboTax

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Your adjustment has been entered in two places, which is why it's being doubled. Other than the exercise and hold screen, your ISO adjustment has also been entered in the AMT section of TurboTax.

1. After logging in to your account, on the Tax Home screen click on Pick up where you left off under Other Tax Situations.

2. Then, click Edit or Update next to Alternative Minimum Tax (AMT). 

3. Click edit on the AMT summary.

4. Leave the first two boxes checked and click Continue.

5. The next screen will ask for your ISO adjustment. 

The amount shown here and the adjustment calculated in the ISO Exercise and Hold screens both flow through to the the AMT worksheet. So you will need to delete one of the entries to avoid overpaying your tax.