Firstly, as when creating any product, you need to be in the right place. The product is either going to be placed in the ‘Generic Products List’ (aka Storefront Products) or its going into the products list for a particular client.
To place the product on a particular clients account, choose the client from the Client List and then hit ‘Products’.
Once there Create a Product, choose Stock, then name the product. You will find all the settings for this products to be a little different from other products.
The important page is Admin > Edit Stock Product > Stock tab
On this page you can
Change the stock count directly
Set up low stock alert emails
Allow managers to replenish stock