From your 'My Hub' page (please see below)
On the left hand side of your account, you will see the side menu in which you can select 'contacts'.
Select the client profile
You can then select 'Financials' from the list below the client profile picture followed by 'Sessions'
Which will allow you to both 'Gift' and 'Deduct' sessions to that client's profile. You can also view sessions booked and the history breakdown of all sessions redeemed.