Click the "File Management Center" under the Seller Tools section.

Click the "Upload Inventory" link and download the eBay Inventory Template.

Fill in the template with the required fields. These include fields for Site ID, Selling format, Title, Description, Category, Quantity, Duration, and Location. For information on specific format and fields, see Uploading Your Product Inventory
Important: To ensure acceptance of your inventory, do not change the template format

Save the template containing all your new or modified inventory, in .csv format.

Click Browse to select the file you saved, or enter the file path.

Click Upload Inventory button.
Note: It may take 30 minutes or more to process your upload. You can check on the progress by clicking on the "File Management Center" link located in the left hand navigation bar. On the File Management Center page under the Uploads section, click the "File Activity Link."