If there is a designated commission for a booking (especially if sent from an Agency or Third party source), this can be recorded within Collins. The commission box can be found in the Additional Details section and can be set as either a £ or %, based on the chosen drop down.
The amount inputted is the total amount of commission for that booking, not per head.
If you need to report on what bookings have commission stats against them, you can filter by a date range and in the Enquiries Download, in column AM will be the how much the commission has been recorded as. In column AN will be what it was recorded as; either percentage or monetary value
N.B, if you are taking bookings on Designmynight.com, this will not apply to these types of bookings. Please speak to your account manager regarding the commission applied and how they are calculated.