Enforcement Rules of the Estate and Gift Tax Act Article 42

In the event that the decedent has failed to file a declaration or has filed an incomplete declaration for the property requiring a declaration by the Act and where the decedent meets the situation described under Paragraph 1, Article 7 of the Act, the beneficiaries shall be held liable for said failure to file a declaration or for the shortage or omission in the declaration and shall be responsible for making the tax and interest payment in proportion to the property they have each received provided the payment is within the total taxable estate or gift amount .
中文原文 遺產及贈與稅法施行細則第42條
贈與人對依本法規定應申報之贈與財產,未申報或已申報而有漏報或短報情事,而贈與人並有本法第七條第一項情形時,各受贈人應對各該次贈與之未申報、漏報或短報行為,按其受贈財產之比例在受贈財產範圍內負繳納稅款及利息之責。

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