For 2021, i nvestment management fees are not deductible on federal returns, but are they deductible on California returns?

That is discussed here. 

https://www.google.com/amp/s/ttlc.intuit.com/community/state-taxes/discussion/can-i-deduct-investment-expenses-such-as-the-cost-of-my-investment-advisor-on-my-2019-california/00/1227851/amp

Investment management fees are no longer deductible as a miscellaneous itemized deduction on your Federal tax return since 2018.

But they are deductible on your CA state return.

In your CA state interview, you will find a screen that says:  Here's the income that California handles differently. Go to Investments > Investment Income Expenses