To register a seller account on eBay, you need to complete the following steps:

1. Visit ebay.com and click the "Register" link in the upper right corner of the page.

2. In "Select your account type", select "Personal or business account" and click "Continue".

3. Fill in the necessary information, such as name, email address and password.

4. According to your business needs, select the corresponding options in the "Sales Settings" page and complete the license verification (if required).

5. Confirm your information and agree to the User Agreement and Privacy Policy.

6. Check that all information is correct and click the "Register" button.

7. You will receive a verification email. Please follow the instructions in the email to complete the verification.

8. After completing the verification, you can start selling items on eBay.

Please note that before registering a seller account, make sure you have read and clearly understand eBay's requirements, obligations and regulations for sellers. In addition, before selling goods, you need to set the payment method and load the product list.