To add a merchant account on eBay, please follow the steps below:

Visit the eBay website: Open eBay's official website (www.ebay.com) in your web browser.

Click "Register": On the eBay homepage, click the "Register" button in the upper right corner.

Select "Merchant Account": On the registration page, select the "I am a merchant and want to sell items" option.

Fill in the information: Fill in your merchant information according to the prompts, including store name, contact information, payment method, etc.

Verify identity: You may need to provide identity verification information, such as bank account information.

Accept the user agreement: Read and accept eBay's user agreement and policies.

Complete registration: Follow the instructions on the page to complete the registration process and create your merchant account.

Set up a store: Once registration is complete, you can customize store settings, add products, and start selling.

The registration process may vary slightly depending on your geographic location and eBay's policies. Make sure you provide accurate information and comply with eBay's regulations.