You don’t have a number in mind?
Tariffs would not completely replace income taxes right now. I would say we average 2.7 Trillion imports per year. A 20% tariff would only yield 540 billion. A 20% NRST could make up the bulk of the rest. Drastic spending cuts would be required in a balanced budget amendment with the new sales tax, higher tariffs. The killing of the 16th amendment would be in the balanced budget amendment too.