If you want to register your Amazon brand with a buyer account (Brand Registry), you generally need to follow these steps:

1. Create a brand: Make sure your products and trademarks meet Amazon's requirements and have a legally binding trademark registration certificate. You need to register your trademark in your country/region and obtain a trademark registration certificate.

2. Register an Amazon seller account: If you don't have an Amazon seller account, go to Amazon's merchant registration page to create a new account.

3. Log in to the Amazon Brand Registry platform: Log in to Amazon's Brand Registry platform with your seller account.

4. Provide trademark and brand information: Provide your trademark registration certificate and other relevant brand information on the Brand Registry platform. Make sure to provide complete and accurate information.

5. Brand verification: Amazon will verify the brand information you provide and may ask you to provide additional documents to prove your brand ownership.

6. Review and Approval: Once you have passed brand verification, Amazon will review your brand registration application. If everything goes well, your brand will be approved for registration to the buyer account.

Please note that the above steps are for reference only and the specific process may vary depending on the country/region and Amazon policy. It is recommended that you visit the Amazon official website or consult Amazon's customer support to obtain the latest accurate information and guidance.