taxation: the imposition of taxes; the practice of the government in levying taxes on the subjects of a state
imposition: the act of imposing something (as a tax or an embargo)
formic acid: a colorless pungent fuming vesicatory liquid acid HCOOH found naturally in ants and many plants or made catalytically from carbon monoxide and steam; used in finishing textiles and paper and in the manufacture of insecticides and fumigants