Whether entering transactions into accounting systems or completing the BAS, bookkeepers are at the coalface of the GST system. Central to that system is tax invoices. Without tax invoices, you generally cannot claim a GST credit for the purchases that you as a GST-registered entity make. Major changes have been made to the invoice rules effective 1 July 2010. This Bookkeepers Knowledge Base examines these changes in detail; changes that will generally make the life of the recipient of a supply easier.