Unfortunately TT Online does not give you direct access to your tax forms. That's only available in the Download version. You can see the checkbox at the top of Side Five in this PDF:
https://www.ftb.ca.gov/forms/2023/2023-540-ca.pdf
Also, previous similar questions indicate that you must enter all your itemized deductions on the federal Schedule A (thus allowing the program to then select the standard deduction for you) in order for the California crossover to work correctly. See this:
What if I itemize for california but take standard deduction for Fed?
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
