Trump says that the U. S. made trillions in tariffs, so where's that money at?

I remember when tariffs were first implemented, shoes especially had outrageous shipping costs. eBay used to have free shipping on most items they sold, then they started charging for shipping.
I was under the impression that the vendors were supposed to pay for the tariffs, but I believe the consumer paid the tariffs not the vendors.
I'd like to know where these trillions of dollars are at? Did they just go somewhere only Trump knows about? Is it a secret? Did the American consumers get any of it for being charged outrageous shipping costs?
Trump says that the U. S. made trillions in tariffs, so where's that money at?
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