Invoicing

Open Sales → New invoice. The editor mirrors the final PDF section by section, shows live VAT totals and the provisional invoice number, and finalizing locks the document with its real number. From the finalized invoice, click Send to email the branded PDF and track delivery (Delivered / Bounced / Spam).

Your outgoing invoice numbers come from gapless sequences — one per company, document kind, and year. Numbers are allocated atomically at finalize and never reused; a cancelled invoice keeps its number, so the series never gets a hole. Configure format and start number in Settings → Number sequences, where a gap report confirms the series is intact.

Every outgoing invoice carries one of 7 selectable VAT treatments — from Standard to EU reverse charge to Export. The system generates the mandatory VAT notice for you, validates EU customer VAT-IDs against the VIES register, and locks line VAT to 0% on schemes where showing VAT would be wrong. Set your defaults in Settings → Tax.

A finalized invoice is locked — you correct it with documents, not edits. Cancel reverses the whole invoice with a mirror-image cancellation invoice (its own number, auto-provisioned sequence, nets to zero). Issue credit note reverses only the lines and quantities you pick while the original stays valid. Both documents are locked and linked to the original.

Settings → Articles holds your reusable products and services: SKU (unique per company), name, unit, net price, and a VAT rate validated against your country's real rates — gross is always derived from net automatically. In the invoice editor, the line-item combobox searches the catalog, auto-fills the line on selection, and can even create a new article inline.