U.S. importers have been given a February 6 deadline to file for electronic refunds with U.S. Customs and Border Protection, should the U.S. Supreme Court strike down President Donald Trump's tariffs.

CNBC reports that importers will have to file for their potential refunds through a new federal digital customs system called the Automated Commercial Environment (ACE), which allows businesses to use a secure electronic portal to file import and export data, manage trade information, and comply with regulations. Before the ACE system was put in place, importers had to manually set up an account with CBP, and then pay or receive funds via email.

The U.S. Supreme Court is expected to rule on Trump's tariffs as soon as January 9, in a case challenging levies enacted under the International Emergency Economic Powers Act (IEEPA). Although IEEPA gives the President the power to regulate trade in response to a national emergency, it had never been used to justify tariffs prior to the Trump administration. Should the Supreme Court rule against Trump, such a decision would invalidate roughly 71% of tariffs issued by the White House in 2025, and force the Treasury Department to return tens of billions of dollars in collected revenue.