The US Supreme Court ruled in February that Trump-era import tariffs were unlawful, and Amazon has received about US$600m (roughly 20 billion baht) in refunds. Amazon says it will refund customers directly where it can trace tariff surcharges, and will reinvest the rest in keeping prices low. Third-party sellers, who make up over 60% of Amazon's marketplace sales, have also filed for refunds. For a Thai SME, this matters only if you export to the US or sell through Amazon US: check whether you paid US tariffs on goods you imported, and whether your marketplace price or surcharge was passed on to US buyers. Otherwise there is no direct action for Thai businesses.