14 December 2011
First you have to estimate your annual income. and than on that basis you have to calculate annual tax liability and pay as follows: Due Date Amount of Tax 15th September At least 30% of Tax on total income for the year. 15th December At least 60% of Tax on total income for the year less advance tax already paid. 15th March 100% of Tax on total income for the year less advance tax already paid.
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