Choose the next invoice number without changing older invoices.

1. Open a new draft

Go to Invoicing → Invoices → New Invoice. Locate the number beside the invoice title.

The number is beside the invoice dates.

2. Enter an unused number

Use a prefix and digits, for example INV-0100. Check that the number has not already been used.

3. Save and confirm

Save that draft. Open the next new invoice and check the suggested number. After INV-0100, the next suggestion is normally INV-0101 if available. Leave previously issued invoices unchanged.