How to prorate CA AMT for nonresident status (ISO exercise)

[Herbert570]

I have two questions regarding the California AMT when exercising the ISO.

1) I am a nonresident of California and work half of my time outside of California. The regular tax from the California source is prorated based on my duty days in California. This California source also compensates me in ISO. If I exercise the ISOs, per CA Publication 1004 (https://www.ftb.ca.gov/forms/misc/1004.html), the AMT should be prorated. Does TurboTax provide a method to enter the ratio or the amount that is taxable for CA AMT?

2) I am a nonresident of California as stated above. Before earning from a California source, I earned ISO from a non-Californian company and I was not in California any time during my service to that company. I exercised those ISO and want to exclude them from California AMT, also according to CA Publication 1004(https://www.ftb.ca.gov/forms/misc/1004.html). Does TurboTax provide a method to exclude those ISO?

I am using TurboTax online version.

[GeorgeM777]

Questions 1 and 2 - Yes, TurboTax does provide a method by which you can adjust your CA income to reflect that portion of your ISO which should not be taxable by CA.  You may have to calculate the ratio, and the links that you provided in your post provide examples of how a CA non-resident can determine the portion of their ISO that is subject to CA tax.

When you have determined the amount that is subject to CA tax, you can then enter that amount on your CA return.  The numbers from your federal return will populate your CA return.  As you go through the CA section, you will see a page such as Here's the income that CA handles differently, or a similar page.  That will be the page where you can enter your ISO information. 

If you don't find an option that matches your situation exactly, on that page there will be a Miscellaneous category, with a sub-category Other Adjustments to Income.  You can enter your adjustment there.  

@Herbert570