If you need to do returns or refunds, open the Orders tab:

You can search your orders by clicking on the magnifier button and type the customer name or order number.

Once you found the order, press on this button:

Then select the products that need to be returned:

Press on this button to select the product(s):

Then press on this button to remove the product(s):

Select the following options if you want to restock items and / or refund items:
Finalize the return by pressing on the "Return products" button:
