Enforcement Rules of the Estate and Gift Tax Act Article 10-2

For filing an application for the disabled and mentally retarded tax deduction pursuant to Subparagraph 4, Paragraph 1, Article 17 of the Act, a copy of the handbook for the severely disabled and mentally retarded specified or other such recognized proof issued by the relevant government organization, or a copy of a medical diagnosis issued by a specialist physician as required in Paragraph 1, Article 19 of the Mental Health Act shall be attached.
中文原文 遺產及贈與稅法施行細則第10-2條
依本法第十七條第一項第四款規定申報身心障礙特別扣除額者,應檢附社政主管機關核發之重度以上身心障礙手冊或身心障礙證明影本,或精神衛生法第十九條第一項規定之專科醫師診斷證明書影本。

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