I have listed below some useful tax links.
1. Lets talk tax, is a blog by former IRD insider Andrea Black. She provides a commentary on topical tax issues. you can follow her on: https://letstalkabouttaxnz.com/
2. The Ministry of Business and Innovation has useful information about tax from a business person's perspective: https://www.business.govt.nz/tax-and-accounting/basic-tax-types/introduction-to-taxes-and-levies/in
3. Inland Revenue's web site is pretty good these days as well:https://www.ird.govt.nz/