This Is the One Big Tax Change Every Senior Should Know About in 2019 by Elizabeth O'Brien Tax season is underway. And, since this year represents the first time most Americans are filing since Congress overhauled the tax code in late 2017, there’s a lot that’s new. The Tax Cuts and Jobs Act didn’t take direct aim at retirees, so don’t expect any change to, say, the taxation of your Social Security benefits or your required minimum distributions.