After obtaining Amazon brand authorization, you can apply for sales rights by submitting brand authorization documents and information to Amazon. When submitting an application, you need to provide relevant supporting documents such as brand authorization letter, product list, sales channel, etc., and ensure that all information is true and valid. Amazon will review the application, and you can obtain sales rights after the review is passed. In addition, you need to comply with Amazon's sales policies and regulations to ensure product quality and service standards in order to continue to maintain sales rights.