When commission tracking is enabled for your account, a Commission card appears on the proposal with % Amount, Fixed Amount and Sales Agent. Choose the agent (an employee user); their default rates are pre-filled from the employee record or from Proposals: Default Employee Commission Percentage / Default Employee Commission Fixed Amount (Order: Catering tab). The card header shows the calculated commission: fixed amount + percentage × proposal total. Reporting is under Catering > Salesman > Commission Report (/admin/events/salesman, permission Proposals Commission Report, only visible when commission tracking is enabled). In the current version the % and fixed fields are read-only unless your account has the edit_proposals_commission permission — that permission has no entry in role settings at all, so only the main administrator account can ever hold it and change these fields after the proposal is created.