Invoice showing 0% tax

If outside EU tax turns to 0%, I would like to make it appear in the invoice (with a short legal notice). Currently, invoices are hiding 0% tax calculations. How can I make it appear?

For some merchants not VAT obliged it is probably more elegant to hide it.
But it is necessary for an EU merchant to make it clear, with a VAT 0% tax field in the invoice.
Feature request: propose a ’show in invoice’ on/off button next to the custom rate in the dashboard.