Hello @Seller_1nhs24MBDhYsB- Thanks for posting here! You may be able to take the following steps to try to print your own label. In Seller Central, select Orders > Manage Returns or go to Manage Returns.

• Go to the Pending Actions tab; and search by "Pending Authorization" or, to authorize a single return request, select the request you want to review.
• You will be prompted to either use the Return Merchandise Authorization (RMA) number generated by Amazon or enter a custom RMA number of your own.

• When you approve a buyer's return request, you will have the option to use either an Amazon generated unpaid return label, or upload your own custom prepaid return label.

Please let me know if this troubleshooting path worked for you. If this did not assist, we can escalate to determine if there is another potential path.

Kindest regards,

Veronica_Amazon