Business, investing. corporations, real estate, financing have complicated accounting and tax computations. The big world of business, investing and real estate allows for many tax advantages and DEFERAL of taxes. It’s not just cut and dried like an employee having earned income. It’s a whole different world that takes expert CPAs and tax attorneys to understand and take vantage of. When a business person gets to that level of involvement, it takes expert guidance to not make mistakes and over pay taxes. If you think Trump understands the ins and outs and intricacies of the tax code to pay no tax, you’re probably mistaken. But he certainly understands the general principles of the tax system to structure his deals to reduce and defer taxes as much as the law allows.