If you need to cancel an order on Shopify, you can do so from the Orders page in your Shopify admin. To do this:
1. From your Shopify admin, go to Orders. 2. Click the order that you want to cancel.
3. From the More actions drop-down menu, select Cancel order. 4. In the Cancel order dialog, select a reason for cancelling the order and then click Cancel order.
You can also fulfill an order partially if you only have some of the products in stock. Click the order that you want to fulfill partially. 3. From the More actions drop-down menu, select Fulfill items.
4. In the Fulfillment status column, next to the items that you want to fulfill, select Shipped or Partially fulfilled from the drop-down menu. If necessary, enter a tracking number for each item and then click Save tracking numbers. 5. Click Done to return to the Orders page