Two very useful sources for keeping up with pending changes in tax law are the Tax Foundation and the Tax Policy Center.
Those who believe that nothing is literally dead-center could put the first just to the right side of the line, and the second just to the left. However, both are are serious and non-partisan.
Here are the links from each that describe the latest on the tax bill that the Senate passed this weekend: one post from the Tax Foundation, and one from the Tax Policy Center.