Enforcement Rules of the Income Tax Act Article 57-1

Where an individual dies or vacates his or her residence within the territory of the Republic of China and leaves the territory, except when the spouse of the individual files a joint tax return according to law, or the individual is the dependent of a taxpayer in his or her tax return, he or she is allowed not to file income tax returns under Paragraph 3, Article 71 of the Act if his or her income to be filed does not exceed the total of the amount of tax exemption and the standard deduction of the year converted in accordance with Article 17-1 of the Act; however, if an application has been filed for refund of the tax withheld and the tax credit as specified in the provisions of Paragraph 4, Article 15 of the Act, or subject to separated taxation as stipulated in the provisions of Paragraph 4, Article 15 of the Act, the said taxpayer shall still be required to file the annual income tax return.
中文原文 所得稅法施行細則第57-1條
個人於年度中死亡或於年度中廢止在中華民國境內居所或住所離境者,除依法由配偶合併申報課稅或由符合規定之納稅義務人列為受扶養親屬者外,其應申報課稅之所得,如不超過當年度規定之免稅額及標準扣除額,按本法第十七條之一規定換算後之合計數者,依本法第七十一條第三項規定,免辦結算申報。
但申請退還扣繳稅款及本法第十五條第四項規定之可抵減稅額,或依本法第十五條第五項規定課稅者,仍應辦理結算申報。

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