The commission that is displayed on your TWS Trade Log will include all commission fees including exchange fees, transactions fees, regulatory fees, etc. related to the specific trade.
For example, the UK stamp duty tax is related to a specific trade and is included. French, Italian and Spanish transaction taxes, however, are not tied to a specific trade and are not included. Also, it will not include any non-commission fees such as borrow fees, ADR fees, etc.
To see any additional fees charged to you, please run an Activity Statement in Client Portal. When charged, stamp duty taxes and transaction taxes are shown in the Activity Statements under the Transaction Fees section.