Follow the below path to edit the Invoice date, Due date, Installment name, Installment start date, End date and the Fee collection account

Method 1: Admin Level Access

Settings --> Finance --> Create Fee Plan --> Select the Academic Year, Type of Fee Plan and Click on Get --> Manage Fee Plans --> Click on View settings against the Fee Type --> Click on Edit against the Installment --> Update the details and click on Update to save the changes

Method 2: Branch Level Access

Finance --> Fee Management --> Manage Fee Plans --> Select the Academic Year, Type of Fee Plan and Click on Get --> Manage Fee Plans --> Click on View settings against the Fee Type --> Click on Edit against the Installment --> Update the details and click on Update to save the changes