Last year, I remember that the President announced in late December there would be tax changes for 2018, so more moola could go into the hands of taxpayers. But those changes were not made until January, so it makes sense that Sage would have to release a tax update in January. And some states really lagged behind in their releases, based on the Fed's release, so several more updates for various states followed. But for this year: I agree with @JohnHoyt - it does look like the Feds updated their tax tables in November , so I'm not sure why the tables in the Dec 19th release didn't have those...maybe because there was going to be another update mid December?