Earlier this month, Amazon announced a new mandatory change coming September 1st, 2022 on their Seller Forums.
Amazon says "September 1, 2022, 'Send to Amazon' will replace the Send/replenish inventory workflow as part of our ongoing efforts to make shipment creation simpler and more flexible."
Amazon goes on to say "August 31 is the last day on which you can create shipments using Send/replenish inventory."
Starting September 1st, the old workflow will no longer be available. All new FBA shipments must be created either in Send to Amazon in Seller Central, or you can use an external 3rd party service to create and manage your FBA shipments.
Sellers can bypass this new Amazon FBA workflow by creating shipments and processing them directly inside of Fillify.com.
Try the Fillify beta today for free: https://fillify.com/invite/BRANDONO406471