Selling services to a business in another EU country? The customer accounts for the VAT — your invoice just has to say so correctly.
Choose the Reverse charge 0% rate on the items and the legal note is added automatically. For goods shipped to a business in another EU country, use Intra-EU supply 0% instead, which adds the Art. 138 exemption note. For the UK's domestic reverse charge, the HMRC wording is used when your business country is the United Kingdom.
Always check the customer's VAT number in the EU's VIES service before invoicing without VAT.
There is no account and no server behind this invoice generator. Your business details, clients, products and invoices are stored in your browser's own database (IndexedDB) and never uploaded. The PDF is built on your device. The only request the app ever makes on its own is optional: if you click Use ECB rate on a foreign-currency invoice, it asks the European Central Bank for that day's reference rate — sending just the two currency codes and the date. That also means nobody else has a copy — download a backup from Settings → Backup now and then, and keep it with your accounting files. Nothing is locked in: every PDF carries its own data, the backup format is documented, and you can download an offline copy of the whole app.
Usually yes — in your VAT return and, in the EU, in the recapitulative statement (EC Sales List). Check with your accountant.
Reverse charge only applies to business customers. Sales to consumers in other EU countries normally use the customer country’s VAT rate (OSS).