In 1980s, tax reforms in the U.S. were taken as an example by all countries. The studies in the U.S. in this field have been still taken as an example by many of the countries. Tax reform arrangements regarding tax system and revenues have been still made in our country at various times as with the other developing countries. However, it has been observed that these arrangements may turn out to be inefficient within only a few years. Although the U.S. has a complex tax system, it is an exemplary model for Turkey due to the high level of prosperity, the success of tax collection, the success in decision-making and implementation, timing, ability, etc. In Turkey, seeking for an optimal tax system is stil in progress. The aim of this study is to investigate the tax system in the USA, as a vitally developed country, by comparing this system whether it is applicable on Turkey. When we compare the system in these countries by a current statistical data, we see that the US has been bounced back and it has recovery even after the big crisis recently. With the result that, Turkey should organize the short and long run tax strategies with respect to the USA and the way of the world policy.