Using the interview or Step by Step, which I would prefer that you use, when you start the CA interview, it will ask about residency. Indicate how many days you were in California in 2023.
Continue and eventually you will come to a screen with the title "Here's the income that California handles differently"
Scroll down (if you need to) to "Health Savings Account (HSA) Contributions" and click on Start or Edit or whatever the button says.
The next screen should be asking you "About your HSA contributions" to let you adjust the automatic amount that is the sum of all HSA contributions on your return. Here you can enter the amount of the HSA contributions that belong to the California income (could be zero).
So where did the HSA contributions come from? From your CA income? non-CA income? Spread over the year?
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