Why isn’t Shopify charging tax on some of my products?
Learn why Shopify may not charge tax on some products: the Charge tax on this product box is unchecked, so enable it for every taxable product to collect tax.Updated last year
One common reason is the "Charge tax on this product" option. If this box is unchecked in a product’s settings, Shopify will not apply sales tax, regardless of other tax rules. Be sure to enable this option for all taxable products.