The tax law known as the Tax Cuts and Jobs Act (TCJA), P.L. 115-97, which was enacted in December, contained the most sweeping federal tax law changes in more than 30 years. Despite the rhetoric about simplifying the Internal Revenue Code (IRC), the TCJA did just the opposite — it added layers of new complexity for many taxpayers.
The federal complexity is matched by uncertainty regarding how state legislatures and taxing authorities will respond.