Nothing personal there "E," but I am amazed how little conservatives actually understand the Constitution they so often praise
First off, no Constitutional right, none, First, Second or Fourth, are absolute, never have been, and never will be
Second, you seem to have forgotten a key element in the Amendment, "upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."
Article I, Section 8, Clause 18, gives the Oversight Committee the authority to subpoena Trump's taxes and Article I, Section 9, Clause 8 gives them cause
And lastly, it doesn't matter, the whole thing will be buried in the Courts for years, that is what Trump does with all his challenges, he doesn't have an army of attorneys and "fixers" on retainer for nothing. However, as long as the issue is alive the question of what is he hiding grows, and when coupled with is soon to be the heavily retracted Barr Report, the concern over Trump's trustworthiness and honesty will only escalate.
In other words, none of it is going to benefit Trump, and even Fox won't be able to deflect the questions