Enforcement Rules of the Income Tax Act Article 65-1

Where a profit-seeking enterprise organized as a sole proprietorship or a partnership files the annual income tax return in accordance with Paragraph 2, Article 71 of the Act or makes its current final report on total business income or income earned from liquidation in accordance with Paragraph 4, Article 75 of the Act, the sole proprietor or partners shall calculate the withholding tax of the income of the aforesaid enterprise based on the respective percentage of his or her investment or partnership contract and deduct the aforesaid withholding tax from his or her consolidated income tax payable on his or her annual income tax return for the year.
中文原文 所得稅法施行細則第65-1條
獨資、合夥組織之營利事業依本法第七十一條第二項或第七十五條第四項規定辦理結算、決算或清算申報,如有當期各類所得之扣繳稅額,得由獨資資本主或合夥組織合夥人按出資比例或合夥契約約定盈餘分配比例計算,於辦理同年度綜合所得稅結算申報時,自應納稅額中減除。

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