@amgracer
Add-on poster @gianola never came back to tell us if it ended up working, or not.
At some point she said she was using a desktop version of TurboTax, as am I, so I did a test sale of stock acquired via an ISO using the "guided" ISO interview, and I saw the AMT adjustment in the federal income tax return and I also saw that same adjustment flow through to the California income tax return. I detailed where the numbers showed up in my reply above.
I did my test using only one stock sale and, maybe, with multiple similar sales TurboTax goes sideways for some reason, but that's easy enough to test particularly if you're using a desktop version of TurboTax. Try creating a new "test" file - you have to provide only minimal up-front "personal"info - and do a test for one sale, then look at your income tax return in Forms mode and see if the adjustment is there in the California income tax return. If it is, do another test sale, then look again. If the information's there correctly do as many test sales as you have in your "live" file, checking each time in Forms mode.
The only other thing I can think of - it seems like a remote possibility - is that maybe California Schedule P(540) really is there in your income tax return but isn't being shown by TurboTax for one reason or another. You can make TurboTax show you the California Schedule P by simply typing in "Schedule P" after clicking on the "Open Form" icon after opening Forms mode.
Of course you could try contacting TurboTax directly and seeing if they can help.
I did a test sale of stock acquired via an ISO
