yup USA don't play with taxes thats how they took down Al Capone...and thats how it looks like the US will take down Allen Weisselberg and his boss.
Capone was pulling in the equivalent of $900 million a year in today’s money of un-reported income. It’s really amazing how much money / crime prohibition generated.
Tax fraud is also very difficult to prove since it generally requires you prove intent. In Trump’s case it’s very likely he winds up settling and paying back taxes before going to prison. It’s possible they will be able to prove intent, but Trump had been very good at taking advantage of intent being very difficult to prove.