As part of a detailed quote (not a quick quote) you will have the option to select your Profile & other details. This is where you can change your charging structure for a quote.
Once you click the button a popup will display your commission options.
Execution - Epos
In you are going from quotes to Epos the commission chosen will pre-populate and cannot be edited in execution. This is to ensure that the customer gets the exact product terms quoted for. To change commission this must be done in MyQuotes prior to submission to execution.