Enforcement Rules of the Income Tax Act Article 24-6

According to Item 2-6, Subparagraph 2, Paragraph 1, Article 17 of the Act, a taxpayer that declares a deduction for housing rent expenditure shall submit the following certification documents:1. Certification documents for lease of house and payment of rent: A photocopy of the lease agreement or other certification documents and payment certificates sufficient to prove the above.2. Certification documents for lease of house for residential self-use: A certificate proving that the taxpayer himself/herself, the spouse or lineal dependents complete registration of household on the address during the taxable year, or the taxpayer’ affidavit clearly stating that the leased house is for the residential use of the taxpayer and not for business operation or professional practice within the taxable year.
中文原文 所得稅法施行細則第24-6條
依本法第十七條第一項第二款第二目之6規定,申報房屋租金支出扣除額者,應檢附下列證明文件:
一、承租房屋及支付租金之證明文件:租賃契約書或其他足資證明文件及付款證明影本。
二、租屋自住之證明文件:納稅義務人、配偶或受扶養直系親屬,於課稅年度在該地址辦竣戶籍登記之證明,或納稅義務人載明承租之房屋於課稅年度內係供自住且非供營業或執行業務使用之切結書。

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