TurboTax does not make the presumption that the California Wage amount includes the add back for the HSA contributions; therefore it adds the amount of the HSA contributions back for you.
You have noticed that the HSA contributions are part of your California wages (i.e., they are not pre-tax). In this case, you can counteract the TurboTax automatic adjustment by going to the screen entitled "Here's the income that California handles differently" and looking at the bottom at the line "Other Adjustments to Income".
Click on Start and enter "Duplicate HSA add-back" for description and the amount of the HSA contributions as a Subtraction (so it will be subtracted from your state income).
[Edited 2.27.2018 | 13:32 CST]
