Treasury Secretary Steven Mnuchin Steven Terner MnuchinLawmakers fear voter backlash over failure to reach COVID-19 relief deal United Airlines, unions call for six-month extension of government aid House Democrats plan to unveil bill next week to avert shutdown MORE on Tuesday said that individuals will be able to defer up to $1 million in tax payments to the IRS for 90 days in light of the coronavirus outbreak.

Mnuchin said that the $1 million threshold was chosen to take into account for pass-through businesses that pay taxes through the individual code on their owners' returns. He said that corporations would be able to defer up to $10 million in tax payments.

The deferrals would occur on an interest-free and penalty-free basis, Mnuchin said.

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Mnuchin argued in a press conference that the move would amount to a deferral of $300 billion, saying that's "an enormous amount of liquidity in the system."

Mnuchin also encouraged Americans who can file their taxes by the April 15 deadline to still do so.

"For many Americans, you will get tax refunds, and we don't want you to lose out on those tax refunds," he said.

Typically, about 70 percent of individuals receive refunds.

Mnuchin's announcement comes after Trump said in an Oval Office address last week that he was instructing the Treasury Department to defer tax payments for individuals and businesses impacted by the coronavirus.

Lawmakers on both sides of the aisle have been pressing Treasury to extend tax deadlines, arguing that doing so could ease financial burdens for individuals and small businesses. Tax professionals have said that extensions could also help tax preparers who can't work from their offices because of the coronavirus.