One fundamental question involved in the tax-reform debate is what impact the current tax plan will have on the federal debt. Proponents of the measure argue that even though lower rates would result in less tax revenue in the near term, greater growth in the tax base would make the measure revenue-neutral over time. That's almost certain to play out with any tax cut, because taxpayers already started taking steps at the end of 2016 to defer income into the current year in the hope that the Trump administration would be successful in implementing new rules for the 2017 tax year. That seems unlikely at this point, but even if tax reform doesn't take effect until 2018, taxpayers would likely be able to hold off on recognizing certain types of income like capital gains until then. Similarly, with trillions of dollars in offshore cash looking to take advantage of favorable repatriation provisions, corporations taking advantage of a tax holiday could add billions to the Treasury's coffers.
Source : http://www.nwitimes.com/business/investment/markets-and-stocks/after-a-year-trump-s-tax-plan-still-struggles-to/article_77acfa78-a63f-5294-982c-b61e3e97449d.html