Regulations Governing the Offsetting or Refund of Duties and Taxes on Raw Materials for Export Products Article 5

The commodity tax collected by the Customs on behalf of the authorities concerned shall be offset or refunded along with the customs duties.
中文原文 外銷品沖退原料稅辦法第5條
由海關代徵之貨物稅應隨同關稅一併辦理沖退。
海關代徵記帳之營業稅由海關依第十三條規定沖銷。

English translation for reference only; the Chinese text prevails. Not legal advice.