Regulations Governing Application of Agreements for the Avoidance of Double Taxation with Respect to Taxes on Income Article 37

Where a resident of the ROC seeks to obtain a foreign tax credit for the amount of tax that has been spared in the other Contracting State pursuant to the tax sparing provisions in association with the term elimination of double taxation under a DTA, that resident shall, while filing the annual income tax return, provide a certificate issued by the tax authority of the other Contracting State which contains information of the applicable laws for the reduction of or exemption from tax, the amount of income, and the amount of the tax reduction or exemption, etc.The obtaining of a foreign tax credit for tax that has been spared in the other Contracting State referred to in the preceding paragraph shall not include the foreign tax credits granted by the DTA between that other Contracting State and a third party.
中文原文 適用所得稅協定查核準則第37條
中華民國之居住者依所得稅協定有關消除重複課稅之規定申報視同國外已納稅額扣抵,應於辦理所得稅結算申報時,提供他方締約國稅務機關出具載有其適用租稅減免之法律、所得額及減免稅額等相關資料之證明。
前項視同國外已納稅額,不包括他方締約國依其與第三國之所得稅協定所給予之國外稅額扣抵金額。

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