Payment Summary information in AccountRight follows the prescribed ATO's format of an individual Payment Summary, which does only list Lump sums categories A, B, D & E
From my understanding, type O Payments are actually Early Termination Payments (ETPs). Help Article: Processing a final pay would be able to assist with that process. When it comes to selecting the ETP Benefit code you would select Benefit Type: Life and Benefit code of O, along with adding in a payment date. For example
From a payroll reporting point of view, you would need to select an ETP based ATO reporting category option. When processing an amount against that category you will have an ETP Benefit field appear on the Pay Employee window to add in that ETP information and select that benefit code.