Self Assessment Tax is utilised to address any shortfall in the tax amount that individuals owe after considering the tax deductions made at source (TDS) or advance tax payments. It ensures that individuals accurately calculate and fulfil their total tax liability per applicable tax laws. By paying the Self Assessment Tax, individuals demonstrate their compliance with tax regulations and avoid penalties or interest charges for underpayment. It provides a mechanism for individuals to rectify discrepancies between the amount already deducted or paid and their actual tax liability, ensuring fairness and accuracy in the tax system.