Pongoose Ltd

App seems to work well. I installed it and set it up for the free plan to send ad hoc invoices to customers after they had ordered. You need to make a settings change to the Shopify store in the tax section if you want to send VAT invoices to customers when they order, which I hadn't done. But to send one after the sale has been made is not possible without the third party app. Customer support was excellent and Tracy was great and very prompt and clear.