For Tim Avanzato and the team at Lanca Sales, Monday marked the start of a high-stakes digital scramble to recover tariffs paid after US President Donald Trump imposed steep duties on almost all imports, including from China, last year. While the New Jersey-based company that imports and exports food packaging has become accustomed to operating under tariffs and adjusting its business around them, Avanzato, who handles global trade and logistics at the firm, said the refund process has...