The tax department is introducing changes to help New Zealanders better file and manage their GST online.
The changes by Inland Revenue were part of a multi-million dollar programme to transform the tax system.
Inland Revenue deputy commissioner transformation Greg James said one of the most significant benefits for customers was the ability to file and pay GST at the same time, as opposed to the current system of having to pay via internet banking after filing a GST return.
The new capabilities would enable taxpayers to complete a range of tasks.
Mr James said the changes were the first in a round of changes planed over the next few years.
"Once we've cut over to the new system they will be able to handle a lot more activity digitally and online so that they can self-serve themselves," he said.
Some 600,000 businesses would be able to use the service from next week.