Total Payments under the Client Activity report will include Fees and Taxes on those payments.
If you'd like to know how much you received before any fees, you should use the Tax Report. This will show you all payments (Cash Report) or Projects with payments (Accrual Report) before fees, and you will see a total of Taxable Sales & Taxes.
To know how much you 'kept' from your sales before processing fees were processed, take the Taxable Sales and subtract Taxes.