Login to your eBay account

In My eBay hover your mouse on the gray button : Account

Click the link manage my store

In manage my store click on under store design : Display Settings

Under display settings :

 Basic Information : on the right side of page click the link Change

Scroll down to store logo

Here is where you upload your logo or use your url link to your logo.

If u are taking it off your pc then click on:

Upload a logo to Picture Manager

Picture Manager is a service offered to Store subscribers by eBay.

Then Click Save Settings.

If you are using the URL we have provided then Paste in the URL.