@Thu
The advice that I gave above is still substantially correct. The HSA deduction belongs to you and you had no income in CA. But TurboTax has no way to know this until you tell it...so this is how you do it:
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You will notice on the main page ("Here's the income that California handles differently"), the first line item is (likely to be) "Health Savings Account (HSA) Contributions". Here TurboTax notes that the amount of your HSA contribution has been added back to the California return.
NOTE, despite the Edit button, you can't change this here.
Scroll down to Miscellaneous Adjustments on this screen. Click Start for Other Adjustments to Income.
Enter in the left column "adjustment for out-of-state HSA contributions". Enter in the middle column (i.e., a subtraction) the dollar amount of HSA contributions made out-of-state. This will be subtracted from your California state income.
Make a note on your copy of your state tax return (because, of course, you are going to save a copy, right?) that you made this adjustment because TurboTax added back all the HSA contributions (even ones made while a non-resident), and you needed to counteract this. This is in case you ever get a letter from the state asking about this adjustment.
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Make sense?
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