If Trump fraudulently filed taxes --that is a crime. If he legally avoided taxes-- that is not a crime.
If the tsx laws he used seem to be unfair to that large group of taxpayers that are NOT real estate developers, then we need to change those laws (or the tax code).
But just because an aggressive interpretation and filing of taxes is not, in and of itself, illegal.
Now, his lengthy audit may determine that a write off has been disallowed, in which a substantial payment would be forthcoming. But that determination comes at the end of a complete audit.
I, for one, would like to see a HUGE rewrite of tax laws regarding depreciation. And a significant rewrite of business deductions allowable. And their specific limits.