Depending on your membership type and the access level you are granted, you can have access to one or more billing categories to create invoices (Passenger, Cargo, Miscellaneous and UATP).
To create a new invoice select the "Create Invoice" option under the respective billing category and populate the required information.
You will be able to capture the transaction types (such as Prime Coupons, Rejection Memos, Billing Memos etc.) after you create the invoice header.
We've also made some step-by-step guides. Check them out
here !