Open the failed job and press Return to sender. Choose who caused the failure: Our side (no charge) or Customer (e.g. nobody home, closed, refused), with a reason. For the customer, the return charge from the rate card is filled in; change it or enter 0 to waive it.
FleetKraft books a return job with its own con note, from the delivery address back to the pickup address. It appears on the dispatch board and in the driver app like any job. The failed job stays Failed, says "Returning to the sender as <con note>", and can no longer be rebooked or cancelled. The return job is invoiced only for its return charge.