Enforcement Rules of the Estate and Gift Tax Act Article 46

The value of properties surrendered by taxpayers for estate and gift tax payment, being part of taxable estate or gift in the ROC, shall be determined according to the value of the estate or gift tax levied upon the property concerned.Where said surrendered property is a depreciative or depletive property, the depreciation or depletion amount accrued during the period between the date of inheritance or gift and the date of in-lieu tax payment application shall be deducted; where other rights have been established thereon, the value of said rights or the amount of debts guaranteed shall be deducted.Where such other right is a mortgage and the debtor has repaid the guaranteed debt after it had been used for tax payment, thereby resulting in a tax payment value in excess of the original tax amount, the provisions under Paragraph 1 of Article 48 shall apply mutatis mutandis.The value of properties surrendered by taxpayers for estate and gift tax payment, being property other than taxable estate or gift, shall be based on the date of in-lieu tax payment application and relevant provisions concerning estate or gift valuation shall apply mutatis mutandis.
中文原文 遺產及贈與稅法施行細則第46條
納稅義務人申請以繼承或受贈中華民國境內之課徵標的物抵繳遺產稅或贈與稅者,其抵繳價值之計算,以該項財產核課遺產稅或贈與稅之價值為準。
前項抵繳之標的物為折舊或折耗性之財產者,應扣除繼承發生日或贈與日至申請抵繳日之折舊或折耗額;其經設定他項權利者,應扣除該項權利之價值或擔保之債權額。
前項之他項權利為抵押權者,其擔保之債權於抵繳後經債務人清償,致抵繳價值超過原抵繳稅款者,準用第四十八條第一項規定辦理。
納稅義務人申請以課徵標的物以外之財產抵繳遺產稅或贈與稅者,其抵繳價值之計算,以申請日為準,並準用有關遺產或贈與財產之估價規定辦理。

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