Once your products are added in from the quick add, you can see all your listings in the product listing page. 

Store Menu → Products

From here you can use the filters & search to locate your product. Once you find the product you want to refine further you can simply click the product and it will take you inside to edit further. (see our enhance products section for more information)

You can also click the cog icon and press the edit button which will also take you inside the product.