A client needs to exist before you can invoice them — you can add one on its own, or on the fly while creating an invoice.
- Open Clients in the sidebar and click New Client.
- Enter their Name (required) and Email, and set their billing Currency.
- Add their billing address if you have it — Tax ID, Country, address lines, city, state and postal code.
- Optionally add a separate contact (name, email, phone) if invoices should go to someone other than the client themselves.
- Click Save client.
Tip: while creating an invoice, the client field lets you add a brand-new client without leaving the invoice editor.