Enforcement Rules for the Act Governing Relations between Peoples of the Taiwan Area and the Mainland Area Article 60

A person of the Mainland Area who inherits the estate of a person of the Taiwan Area under Article 66 of the Act shall file for inheritance tax in accordance with the Estate and Gift Taxes Law; any person that is exempt from filing a tax return within the prescribed time period under Article 23 of the Estate and Gift Taxes Law shall, within two months from the date of the application of succession submitted to the court at the place of the deceased’s domicile, apply for an extension of the filing deadline, applying mutatis mutandis Article 26 of the Estate and Gift Taxes Law, provided that in case of inheritance involving other taxpayers outside the Mainland Area, the tax return shall still be filed in accordance with the Estate and Gift Taxes Law by taxpayers outside the Mainland Area.The filing of a tax return is exempt in cases where inheritance taxes for the estate in question have been filed by taxpayers outside the Mainland Area or checked and approved by the tax authorities.
中文原文 臺灣地區與大陸地區人民關係條例施行細則第60條
大陸地區人民依本條例第六十六條規定繼承臺灣地區人民之遺產者,應依遺產及贈與稅法規定辦理遺產稅申報;其有正當理由不能於遺產及贈與稅法第二十三條規定之期間內申報者,應於向被繼承人住所地之法院為繼承表示之日起二個月內,準用遺產及贈與稅法第二十六條規定申請延長申報期限。
但該繼承案件有大陸地區以外之納稅義務人者,仍應由大陸地區以外之納稅義務人依遺產及贈與稅法規定辦理申報。
前項應申報遺產稅之財產,業由大陸地區以外之納稅義務人申報或經稽徵機關逕行核定者,免再辦理申報。

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