seller's Australian business number (ABN).document is intended to be a tax invoice.Tax invoices for taxable sales of less than $1,000 must include enough information to clearly determine the following 7 details: the sale type (for example, a sale that includes both taxable and non-taxable items).The information a tax invoice must include depends on: If a customer asks for a tax invoice, you must provide one within 28 days, unless it is for a sale of $82.50 (including GST) or less.

Explains when to provide a tax invoice, what it must include and dealing with non-taxable sales and rounding.