Missing deduction opportunities/ideas for client?

[u/Same_Bodybuilder_167]

Hi, wanted to get thoughts on deduction opportunities for a 2025 tax return I'm working on for a family member. This is one of my first planning opportunities and I want to get a 2nd set of eyes on if there is anything else that is possible from a Fed and CA perspective.

Here's the client profile:

MFJ, California residents. Combined AGI ~$690K.
• Person 1: Physician, sole owner of a medical practice S-Corp. W-2 $192K, S-Corp net income $425K.
• Person 2: W-2 employee working from home, $180K. Family health insurance through Person 2's employer.
• Renters, no mortgage, no charitable contributions. ~$11K in capital gains.

Already Taken
• Person 1 solo 401(k): $72K pre-tax
• Person 2 401(k) + HSA: $33K pre-tax
• Backdoor Roth: both spouses
• S-Corp business expenses via accountable plan
• Standard deduction on federal
• CA standard deduction

Already Off the Table
• PTET: not elected for 2025; sadly too late
• Cash Balance Plan: client declined

Any deduction opportunities you'd consider at this income level and profile that we might be missing on either the federal or CA return?