That doesn't make sense to me. A tax cut is simply the reduction in the amount of money the government takes from an individual.
That's not true. Corporations were not part of the "massive" tax cut. Their rates remained the same. Moreover, it's not about getting money "back". It's about not paying as much.
For example (by analogy), When the price of gas goes down, the gas companies aren't giving me a present. They are simply charging less for their service.