That's like asking what an ocean is but preferably in more detail than just water.
But to answer the question, we really can't give more detail. Congress passes a budget and delegates out to subcommittees to figure out how to spend the money (not revenue) that they were allotted.
So a subcommittee has been authorized to find 4.5T of tax cuts over the next ten years and we won't know what they are until a later date.
There isn't a single Republican budget yet - the house and senate have their own versions of the budget they need to reconcile. That said, the house budget (which just passed yesterday) I believe hews more closely to the Whitehouses' proposal.
But as a summary, you can probably look at Table 1. The values given are over 10 years, so divide every by 10 to get a sense of per year. As written it looks like:
* Overall decrease 170 billion per year in spending (overall Federal spending is about 7 trillion per year). There are cuts across the board except in DoD, DHS, and DoJ.
* Tax cuts decreasing revenue by ~450 billion per year. There is a section in the report identifying all of the different tax cuts. This decrease in tax revenue includes the effect of locking in Trump's first term tax cuts which are currently set to expire.
That's like asking what an ocean is but preferably in more detail than just water.
But to answer the question, we really can't give more detail. Congress passes a budget and delegates out to subcommittees to figure out how to spend the money (not revenue) that they were allotted.
So a subcommittee has been authorized to find 4.5T of tax cuts over the next ten years and we won't know what they are until a later date.