On the Main menu, click on My Business and then select Business Profile
Click update next to the business name
Change you business name and click Save
The New Business name is now uploaded on Key business information
NB You cannot change your business name if it has been registered with NZBN. If you want to change the name you trade under, you must register it as a new business name. Once you’ve registered the new name, you need to cancel your existing name.