To change your eBay store name, follow these steps:

Log in to your eBay account. On the eBay homepage, click the "My eBay" button in the upper right corner and enter your username and password to log in.

On the "My eBay" page, find the "My Seller Center" option. It is usually located in the left menu bar of the page or in the links at the bottom of the page.

After entering the seller center, find the "My Store" option and click to enter. Here, you can view your store information, including the store name and other settings.

On the store settings page, find the "Store Name" or "Store Name/URL" option. After clicking this option, the system will prompt you to enter a new store name.

Enter the new store name you want to change and make sure it complies with eBay's naming guidelines. These guidelines include not using special characters, not infringing on the rights of others, and not violating laws and regulations.

After confirming that everything is correct, click the Save or Confirm button to update the store name. Follow the system prompts to complete the verification steps and make sure to provide accurate information.

After clicking the Save or Confirm button, wait for the system to process the request.