Cora Alvi, who was a national deputy finance director for Trump's presidential campaign, will also be a deputy chief of staff
Taxpayers' refunds in the first tax season since the overhaul was enacted are smaller than last year's
The plan would cut the 35% corporate income tax to 15%
Tax plan includes a cut in taxes on public companies to 15% from 35%
The new tax proposal proposes to bring down the corporate tax from the current 35 per cent to 15%
Overhaul to also benefit individual taxpayers
His announcement surprised Capitol Hill and left Trump's own Treasury officials speechless