Do account management fees qualify as miscellaneous investment expenses on form 8960 line 9c? If yes, where do I enter these expenses?

On form 8960, miscellaneous investment expenses on line 9c can be deducted only to the extent these items are deductible in Schedule A. As the new tax law has suspended the itemized miscellaneous deduction, these expenses are not deductible on form 8960 either.

Please see these IRS instructions for form 8960, especially on page 19.

NO. here are line 9c instructions

Line 9c—Miscellaneous Investment Expenses
Investment expenses you incur that are directly connected to the
production of investment income are deductible expenses in
determining your net investment income. Generally, these
amounts are reported on Form 4952, line 5. See Form 4952 for
the instructions for line 5 for more information. The amounts
reported on line 9c are the amounts allowable after the
application of the deduction limitations imposed by sections 67
and 68.

4952 line 5 instructions

Line 5
Investment expenses are your allowed deductions, other than interest
expense, directly connected with the production of investment income.
For example, depreciation or depletion allowed on assets that produce
investment income is an investment expense.
Include investment expenses incurred directly by you or reported to
you on Schedule K-1 from a partnership, or by an S corporation, but
only if you are allowed a deduction on your return for the expense.

The TCJA of 2018 (in effect through 12/31/2025 unless extended) affect the deductibility of investment management fees. The law doesn’t allow deductions of investment management fees and other related expenses. These include:

Financial advisor fees
Custodial fees for individual retirement accounts (IRAs) and other investment accounts
Accounting costs
Fees paid for legal counsel and tax advice
Rental fees for a safe deposit box
Investment publication subscription costs