The Enforcement Rules of the Land Tax Act Article 7

For land owners possessing concurrently lands subjected to progressive land value tax payment according to Article 16 of the Act and lands eligible for progressive land value tax exemption according to Articles 17, 18, and 19 of the Act, the competent taxation authority shall calculate the amounts payable respectively but impose the taxes collectively.
中文原文 土地稅法施行細則第7條
土地所有權人如有依本法第十六條規定應予累進課徵地價稅之土地及本法第十七條、第十八條或第十九條規定免予累進課徵地價稅之土地,主管稽徵機關應分別計算其應納稅額後,合併課徵。

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