A Stock Keeping Unit (SKU) is an identification number that helps you track your inventory items.
1.) Head over to the "Inventory" tab and select "New Item"
*Note: You can also edit an existing item by following the same steps below.
2.) Select the button that says " Add SKU". You may have to scroll down a little bit before you see it.
3.) Add the desired SKU number and select a vendor. Then select the green "add" button.
You should now see the SKU number under the Vendor SKUS.