"Tax avoidance" and "tax evasion" are technical terms in accounting with very specific definitions and entailments, and the difference isn't just in the English words. Most accounting textbooks and courses cover this.
https://en.wikipedia.org/wiki/Tax_avoidance
https://en.wikipedia.org/wiki/Tax_evasion
Even in Europe, this technical difference is recognized, but with one catch: the EU has enacted a counter-avoidance directive (ATAD, Jan 2019) - evasion is always illegal. This is not the case in most places around the world.
Infographic:
https://www.europarl.europa.eu/news/en/headlines/economy/201...
Fiscal vocabulary:
https://www.europarl.europa.eu/news/en/headlines/economy/201...
Finally, the HN guidelines provide good tips on how comment productively. (see the In Comments section) This helps us learn from each other's experiences.