Inland Revenue appears to have successfully negotiated what is described as its "biggest changes in 20 years".
Online services in myIR were available this morning, with a new-look web interface, after a week-long shutdown.
Inland Revenue Deputy Commissioner Sharon Thompson said last week that almost 20 million tax records were to be transferred to a new computer system, called Start, during the shutdown.
Start is powered by software from US-based Fast Enterprises. A host of companies, most prominently Accenture, are working on IRD's overall transformation.
“When we reopen on Friday 26 April, we will have a vastly superior tax system – one that can issue automatic tax refunds and can operate closer to real time to help more New Zealanders pay the right amount of tax at the right time," Thompson said.
A spokesperson today confirmed the switch-over had been successfully implemented, though it would take time for any potential glitches to emerge.
This is the third shut down under IRD's $1.8 billion-plus business transformation. GST and other business taxes were already migrated.
The new release sees individual income tax records moved to the new system, allowing processing of automatic tax assessments and mechanisms to make sure taxpayers are on the right tax code.