How would I amend my state (CA) return to be itemized instead of standard?

I initially submitted both my federal and state (California) returns as standard deduction, but would like to amend my state to be itemized instead. Through the amendment process, I can change the federal, but at no point, does it offer to change the state.

There was a post for 2022 explaining how to do it, but I cannot replicate it with my 2023 return.

https://ttlc.intuit.com/community/after-you-file/discussion/how-do-i-amend-my-state-return-from-standard-to-itemized-deduction-i-clicked-yes-to-itemize-for/00/2971166

Thanks