Enable inventory tracking
When you receive inventory from your supplier, Shopify updates the number of items that you have available in your store, which means that you don’t need to update it manually. For this to work, you must enable Shopify’s inventory tracking option for your products and variants.
From your Shopify admin, go to Products > All products.
Click the name of the product that you want to track.
If the product has variants, then click the variant that you want to track.
In the Inventory section, select Shopify tracks this product's quantity from the Inventory policy list.
Set the quantity.
Click Save.
From the Shopify app, go to Products > All products.
Tap the product that you want to track.
If the product has variants, then tap the variant that you want to edit. You'll have to set inventory tracking for each variant individually.
Tap Inventory:
On the inventory screen, enable Track quantity.
In Quantity, enter the number of units that you have for the product or variant.
Tap the name of the product to return to its details screen.
Tap Save.
From the Shopify app, go to Products > All products.
Tap the product that you want to track.
If the product has variants, then tap the variant that you want to edit. You'll have to set inventory tracking for each variant individually.
Tap Inventory:
On the Inventory screen, enable Track quantity.
In Quantity, enter the number of units that you have for the product or variant.
Tap the back arrow to return to the product details screen.
Tap the check mark to save the product.
What's next?
After you enable inventory tracking, you can create a transfer.