I am not sure if this is asking if the income tax we already pay is constituitional because if it is not then we have been conned for many years. But I can not see where it is not. We are mandated to support a government that is trying to do right by its people.
The Constitution allows for Congress to make appropriate laws to see to the running of the Union, and obviously the country cannot function without tax. Income tax is the fairest way for people to provide for general things in the country that everyone benefits from such as education, roads, etc.
Edward Douglass White, Chief Justice of the U.S. Supreme Court from 1912-1921 Did the 16th amendment authorize a new kind of tax called the ‘income’ tax? No it did not. “This result, instead of simplifying the situation and making clear the limitations on the taxing power, which obviously the Amendment must have been intended to accomplish, would create radical and destructive changes in our constitutional system and multiply confusion.” The court went on to say “It is clear on the face of this text that it does not purport to confer power to levy income taxes in a generic sense, an authority already possessed and never questioned,…” [240 U.S. 1, 18] Chief Justice Edward Douglass White delivered the opinion in both cases.