commutation of taxesglossary / COMMUTATION OF TAXES commutation of taxes. A tax exemption resulting from a taxpayer’s paying either a lump sum or a specific sum in lieu of an ad valorem tax. [Cases: Taxation 200. C.J.S. Taxation § 273.] 词条贡献者 双语律师Jason,国内知名法学院国际贸易专业,擅长翻译各类与出口管制、经济制裁及海关相关的法律文件。