Return labels can be printed together with the carrier label when Generate Return Label equals Yes in the shipment options on the Package Worksheet.

Business Central in a web client does not support the Automatic printing option unless you have a web-enabled printer configured for report 23055601 on the Printer Selection page to use a printer configured for Microsoft Universal print or PrintNode Connector (see Configure PrintNode Connector).

To get a user prompt to print the return label along with a carrier label, open the Dynamic Ship Setup page to change the Carrier Label Print Behavior to Automatic with Prompt.