STEP 1:  Click on Sell on eBay.

STEP 2: Choose your type of auction (Ex.  Online Auction, Fixed Price, Store Inventory, etc.)

STEP 3:  Login (if prompted)

STEP 4:  Choose A Category

STEP 5:  See Diagram below for pasting your code.

STEP 6:  Complete the rest of your information and list your item.