Australian tax invoice requirements

A GST-registered business in Australia must provide a tax invoice for a taxable sale of more than $82.50 (including GST), or whenever a customer asks. For sales under $1,000, the tax invoice must show seven things.

• The words "Tax invoice"
• The seller's identity (business name)
• The seller's ABN (Australian Business Number)
• The date the invoice was issued
• A description of the items sold, including quantity and price
• The GST amount — or a statement such as "Total price includes GST"
• The extent to which each sale is taxable
• For sales of $1,000 or more: also the buyer's identity or ABN

Verified against the ATO (Tax invoices, GST). Confirm current ATO guidance for your situation.

Official source: ATO: Tax invoices