Are commissions paid to brokers from taxable accounts, tax deductible? Also, the same question with regard to IRA accounts that have an RMD?

My broker sells and buys stock in 3 accounts.  One is a brokerage account, one is a personal IRA, (from which I am not yet required to take an RMD).The last account is a beneficiary IRA from which I do receive an RMD.

There are commissions listed for transaction.  Are those commissions tax deductible? If so, on which accounts?  And where do I put it in Turbo Tax for Home and Business?