Where do my taxes go?
Your taxes go into this gigantic pool of trillions and trillions of dollars that the government gets to spend. Congress decides with their appropriations where the money is to be spent, and the executive branch decides if and when they're going to spend it. Just because Congress votes to spend it doesn't mean that the President is going to spend it that way, and if the President decides in circumstances that money needs to be spent somewhere else, then he'll spend it somewhere else.