Cut the budget further like any individual, family or private business would have to do. Never bring back an income tax. It is the worse kind & unfair form of taxation. A little less than 50% of the people pay little or no federal income tax. Those of us who do have to pay an income tax have to pay for everyone. In effect one group of people also has to pay the bills for another group of people. This is wrong. With a flat sales tax, everyone is involved in paying the bills of government. The cost of government would be kept under better control when every taxpayer had to help pay for it under a flat sales tax. Marx & Engels supported an income tax in their Communist Manifesto. Our Founding Fathers did not believe in a direct tax on people because it was detrimental to the liberty of the people. They favored a consumption tax.
https://nccs.net/1996-03-answers-to-americas-tax-problems