That is complete and utter nonsense. Tax avoidance is by definition legal. It's the definition of "avoidance" vs. "evasion": If it's legal it's tax avoidance and if it is illegal it is tax evasion. You seem to be talking about incorrectly reporting your income, which is a totally different matter, and not only the tax office but also the SEC would be after Apple if that happened.
Your talking nonsense. You don't understand how complex tax avoidance can be.
Tax avoidance ranges from simple legal deductions, to intricate schemes . If the tax office disagrees with your tax return they can take you to court over your tax avoidance, if you loose , and happens , your pay interest and penalties. Schemes are challenged in court all the time.
Tax evasion , you purposely do not declare income. = illegal , worst case possible legal conviction
Tax avoidance , you declare all your income, but setup schemes to take advantage of loopholes in the tax system you believing are right, and within the law to minimize the taxes you pay. Tax office reviews your return, they disagree with you and send you a notice saying your scheme is not valid , with a debt. You challenge thier accertions, as you are legal allowed to, stating you case. You both go to court, win or loose, it's legal, but you either owe them more money, or your avoidance was successful. Worst case you pay extra tax.