"If the estate tax is eliminated, the loss of federal income would exceed $269 billion over the next decade."
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That is $26.9 billion annually for ten years, less than 1% of annual federal spending.
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The annual federal budget is $3.7 trillion over ten years that is $37 trillion. About 67% ($2.5 trillion) of the annual federal budget goes to entitlement programs, about 16% ($602 billion) goes to defense spending, about 6% ($223 billion) goes to interest on the debt leaving about 11% ($407 billion) for all other federal programs combined. https://www.cbpp.org/research/federal-budget/policy-basics-where-do-our-federal-tax-dollars-go
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The US federal government has a spending problem not a revenue (tax) problem. 67% of which can be attributed to entitlement spending.
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To lower the deficit, spending and revenue must be addressed. The federal government would need to run a $500 billion annual surplus for more than 40 years to pay off the current $20 trillion national debt.