As you want to find IRD Number of Inland Revenue, so you should follow these instructions:

Instructions to Find IRD Number:

Visit official website of Inland Revenue.

You will get link to login in right middle side.

You will be on a new page after clicking Login link. That page looks like following image:



Fill User ID and Password and get IRD Number.

Here I am providing all important contact numbers for your reference:

Make an appointment
0800 775 247

National Office and media enquiries
04 890 1500

Overdue tax and returns
0800 227 771

Tax agents
0800 456 678

General enquiries
Inland Revenue
PO Box 39010
Wellington Mail Centre
Lower Hutt 5045