If you come home and find an envelope of money slipped under your door which shouldn’t have been given to you and bring it to the police, you will never be taxe

If you come home and find an envelope of money slipped under your door which shouldn’t have been given to you and bring it to the police, you will never be taxed on it. Anyway the correct analogy here would be incorrectly receiving from someone you know payment in cash which should have been given to someone else. You realise the mistake when you are back home so you bring it back later. You obviously didn’t owe taxes while you were merely storing the money which wasn’t yours in the first place.