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Planned system outage - 12 September 2026 | Our online services including myIR, self service phone lines and gateway services will be unavailable on Saturday 12 September, 2026 from 1pm to approximately 10.30pm while we complete a planned system update. We apologise for any inconvenience this may cause.

An audit is a check of tax and business records to make sure you’ve paid the right amount of tax. They can cover income tax, GST and employer returns.

After an audit you may be entitled to a refund or you may have to pay more tax. Our Inland Revenue audits guide – IR297 explains our different types of audits and what to expect if you’re selected for one.

You can also read more about computer-assisted audits in our Computer-assisted audits guide – IR297A.

Last updated: 06 May 2026
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