Regulations Governing Application of Agreements for the Avoidance of Double Taxation with Respect to Taxes on Income Article 27

Where a resident of the other Contracting State derives income from ROC sources, other than those provided in the preceding four articles, and is entitled to a reduction of or exemption from tax in accordance with the provisions of a DTA, that resident shall provide a Certificate of Residence issued by the tax authority of the other Contracting State along with other relevant documents in connection with such income, and apply to the tax collection authority where the payer of such income is located for approval. Where the income is subject to withholding tax under Article 88 of the Income Tax Act, the tax collection authority shall, when issuing the approval, simultaneously notify the tax withholder of the reduction of or exemption from the withholding tax.When, in accordance with the stipulations of the Income Tax Act, the resident of the other Contracting State referred to in the preceding paragraph is required to file the annual income tax return or file a tax return and make tax payment, such resident may submit the documents specified in the preceding paragraph while filing the annual income tax return or filing a tax return and making tax payment to concurrently apply for the application of a DTA. The tax collection authority shall determine the amount of income which is entitled to the reduction of or exemption from such tax.
中文原文 適用所得稅協定查核準則第27條
他方締約國之居住者取得前四條規定以外之中華民國來源所得,依所得稅協定規定,應減免所得稅者,應檢附他方締約國稅務機關出具之居住者證明及所得相關證明文件,向給付人所在地之稅捐稽徵機關申請核准。
其屬所得稅法第八十八條規定扣繳範圍之所得,稅捐稽徵機關於核准時,應副知扣繳義務人免予辦理扣繳。
前項他方締約國之居住者依所得稅法規定,應辦理所得稅結算申報或申報納稅者,得於辦理所得稅結算申報或申報納稅時檢附前項規定文件,併同申請適用所得稅協定,由稅捐稽徵機關核定其減免稅之所得額。

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