Tree, Inc, operates a branch in Chile. In the most recent year, Tree included $$1,000,000$ of taxable income from the Chile branch in its U$.$S$.$ taxable income, along with $$3,000,000$ of taxable income from its U$.$S$.$ operations. Tree paid $$120,000$ in Chile income taxes related to the $$1,000,000$ in branch income. Assuming a U$.$S$.$ tax rate of $21\%,$ what is Trees$$ U$.$S$.$ tax liability.