As @xmasbaby0 explained, W-2 employees cannot deduct job-related expenses on their federal return.
However, if you itemize then California does permit deduction of unreimbursed employee job-related expenses on your California state tax return (CA Form 540NR), subject to the 2% floor. You would enter those expenses in TurboTax on the "federal" side. The program will pass them through to your CA return.
Also, if you are paid as an independent contractor (meaning your income is reported to you on a 1099-NEC rather than a W-2), then your business-related expenses are deductible on Schedule C of your federal return.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
