Issued an invoice with a mistake, or refunding part of it? A credit note corrects it the right way — without deleting anything.
Once an invoice has been issued, most tax rules don't allow you to edit or delete it. Instead you issue a credit note (also called a credit memo, dobropis, Rechnungskorrektur or avoir) that cancels all or part of it, and then a new invoice if needed.
Open the issued invoice and choose More → Create credit note. The credit note copies every line with negative quantities, references the original invoice number and date, and uses its own numbering series. Remove or adjust lines for a partial credit.
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. That also means nobody else has a copy — download a backup from Settings → Backup now and then, and keep it with your accounting files.
Yes. The lines are the original quantities with a minus sign, so the VAT summary and total are negative and cancel the invoice exactly.
You can mark an issued invoice as void, which keeps its number. If the invoice was already sent to the client or reported, a credit note is the cleaner correction.