Step 1: Add the tax from tax settings page
Go to Settings > Taxes page.
Step 2: Add tax to products from Product details page or in bulk through Product import
You can open the Product list, click on any product SKU to access its product details page. You can locate the Tax input on the same page.
You can also import the taxes in bulk by specifying the tax name in the tax column in exported Product list file.
Step 3: Taxes will be automatically applied on Products in Purchase orders
Taxes will be automatically selected and applied in Purchase orders for the products.