Hi! If the invoice does not show any taxes at all, it means that your taxes have not been setup correctly in WooCommerce (or at least, weren’t at the time the order was created). See: Invoices don’t display taxes
If you need more advanced display of the taxes in the invoice (per line item, and split in the totals as separate rows per tax rate), then you can do this with the Premium Templates extension. With the customizer this allows you to configure the price display to your own preference: Using the customizer
Let us know if you have any other questions!
Ewout Fernhout