IRD - Manage account access (MAA)

A service for businesses and tax agents only. This service allows all organisations to manage access to their online services account. Manage account access (MAA) allows you to control access to particular services, suspend or cancel those access rights, change your details, reset passwords and view user access reports.

http://www.ird.govt.nz/online-services/service-name/services-m/online-maa.html