They go out of their way to make things complicated. Do they really expect everyone in the country to learn their whole new system just for one invoice in one particular month? what difference does it make anyway?
But the Government introduced legislation to allow companies to charge GST at the lower rate for invoices up until October 11 for goods and services provided before October 1. Revenue Minister Peter Dunne said it was regrettable that companies had decided to ignore the new legislation, which would have saved their customers money.
GST is charged on everything all the time every month. Every time anyone buys anything anywhere, GST must be calculated and handled by people who need to be paid to do this - twice in fact, once by business and once by bureaucrats. If you really want to complain about GST, there are much better targets than businesses who don't hire extra accounting staff every time the government has a whim.