Where do I enter home office expenses for utilities and insurance etc. when working remotely for w-2 employer?

Those items are no longer deductible on your federal return if you are a waged employee getting a W-2.

Employee job related expenses

However, if your state allows you to itemize, you may be able to claim a deduction on the state return. 

Enter all of your information in the federal section to ensure it gets pulled into your state return. 

1. Go to the Federal section of the program
2. Go to Deductions & Credits 
3. Under All breaks, select Employment Expenses 
4. Select Job Expenses for W-2 Income 
5. On the next page, you should see a page titled Review your job-related expenses info.
6. Review your input if needed.

Employee business expenses are not deductible on a federal tax return due to the tax code changes in effect for tax years 2018 thru 2025.

Sorry---W-2 employees cannot deduct job-related expenses on a federal return.  Job-related expenses were eliminated as a federal deduction for W-2 employees by the tax laws that changed for 2018 and beyond.  Your state tax laws might be different in AL, AR, CA, HI, MN, NY or PA.

https://ttlc.intuit.com/questions/4482873-which-federal-tax-deductions-have-been-suspended-by-tax-reform