All of the income and deduction items that you entered in the Federal return flow through to the California return. The interview questions in the California return allow you to enter adjustments for items that are treated differently for California than they are for the Federal return.
At the screen, "Here's the income that California handles differently", go over each item in the list that appears on your return and answer the questions. TurboTax will then make any needed adjustments.
See the screenshot below of the interview question about investment income expenses.

If the expenses were for income that is taxed on the federal return but not taxed on the California return, this question is asking you to put the expense amount in as a negative number (with a minus in front of the number). If the income for which you had expenses is taxable on both the federal return and California, then you do not need to enter anything.
You can look at California Schedule CA to find all of the additions and subtractions TurboTax has made to your Federal income and deductions for your California return.
If you have a Desktop version of TurboTax, go to Forms and look at Schedule CA under the list of California forms.
In Online versions, you can preview your return before filing to find out how your taxes were calculated. See here for details.
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