👀 Are you sure?
Mixing just means new address for approx same btc amount. Isn't that a new obtained Bitcoin to the tax office?
What is a taxable event? Holding btc for 12m and a day? Doubt it.
I'd say it's spending it after at least 12 months. But what if you spend it partly?
Taxation is not a simple theft but advanced game where you lose the most.