Hi David, All of this can be done using free plan, for small stores it's a good fit.I also don't see the problem to have more options to choose.   

Our Oxilayer PDF Invoice generator app can generate such invoices.   

Hi, No one has mentioned, but you can add VAT ID field to the thank you page. It's also not perfect solution, but it can be used as an alternative. VAT ID is saved to the customer metafield and can be added to an invoice. You can add such app block w...

You can try our Oxilayer PDF Invoice generator app: https://apps.shopify.com/pdf-printer It should fit your needs. There is the option to include invoice or receipt PDF download link into Shopify "Invoice", "Order confirmation" or other email. Also P...

This error occurs when user clicks on a "Install" app button, and stays longer than 1 minute in authorization page, then  the cookie "shopify_session_id" expires and this error shows up. Update:Here is a nice solution: https://github.com/Shopify/shop...