If you need to cancel talent you have booked, go to the job in question > view applicants > booked tab > and use the 'Cancel' button if it's just an individual talent within a group, or 'Cancel Job' button on the booking if cancelling the entire job in full.
It is also helpful to let the talent impacted know why the job was cancelled. You can do this in the messaging tool.
Please be aware that jobs cancelled within 24hrs of the start date of the commencement will incur a full fee. Please view the T&Cs for further information.