What information belongs on a tax invoice?
ATO guidance requires enough information to identify the seller and ABN, issue date, what was supplied, quantity where applicable, price, taxable treatment and GST amount. It must be clear that the document is intended as a tax invoice. For a total of A$1,000 or more, the buyer's identity or ABN must also be ascertainable. Check the ATO sources below for the full requirements and ask your bookkeeper about your circumstances.