CBP told Judge Richard Eaton that the technology upgrades it plans would save more than 4 million man-hours in processing refunds for Trump's tariffs.

U.S. Customs and Border Protection told a Court of International Trade judge on Friday that it is not currently able to comply with his order to begin refunding reciprocal tariffs imposed last year by President Donald Trump, which the Supreme Court recently ruled are illegal.

CPB in a court filing cited its existing technology, processes and manpower requirements as the reasons it could not immediately comply with the conditions of Judge Richard Eaton’s order. But the agency also suggested it could begin issuing refunds by late April after revamping its technology.

CBP told Eaton in the same filing that the total amount of so-called IEEPA tariffs collected as of Wednesday by the agency and estimated duty deposits related to such tariffs “is approximately $166 billion.”