1. Navigate to Settings > Shipper Setup
2. Click Add New and choose Amazon Logistics
3. Enter an Account Number. This value is just for internal use.
4. Click ‘Save’
Other Tips for Setting up your Amazon Logistics Account
Note Usage: Chose to include shipment number or SKU number in the 'Note' field
Click the ‘Options’ tab to set default settings for your Amazon Logistics account such as default package type, default confirmation, default box dimensions and description