Billions in Taxes Go Unpaid. Under Trump, the I.R.S. Won’t Say How Much.

The absence of the annual estimate on the tax gap could make it more difficult to assess whether more taxes are going unpaid since President Trump took office.The holding up of the tax gap estimate comes as President Trump’s administration has pushed out roughly a quarter of the I.R.S. work force and cut the agency’s budget, weakening its ability to conduct audits.