The salt tax was charged in India – but by the British, of course. http://en.wikipedia.org/wiki/History_of_the_British_salt_tax_in_India (sorry – working in iPad and links are harder). It’s relevance was it was introduced with complete contempt for its impact in people, to deny a basic need and to grant a monopoly right to make profit and abuse to a tiny elite.
The wikipedia article\’s opening line:
Taxation of salt has occurred in India since the earliest times.