Seoul—South Korea’s customs agency has been conducting a probe into local oil refiners since last month for their “excessive tax refunds” related to North Sea crude imports. “We have been investigating refiners and are currently reviewing their tax documents for the past years,” an official at the Korea Customs Service told Platts Friday. The official, speaking on condition of anonymity, said the customs agency has conducted on-the-field probes and has found some evidence that refiners have received excessive tax rebates. Once the probe is over, the country’s tax age
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