Effective 1/22/2024, the shipments can also be cancelled from ScanPower.  

Follow the below step to cancel a shipment.

  1. Click the edit button on the shipment as illustrated below.
  2. Click delete (Trash icon), next to the content status (Feed). 
  3. Confirm the shipment cancellation 

This will delete the shipment from ScanPower and also in Seller Central.