you need to assess your full years tax liability and based on the past trend of income pay advance tax. at the time assessing your final tax liability if at all there's any shortage of tax paid then you need to pay SA tax. there's no specific portion of SA tax to ba paid against advance tax
if someone is paying SA tax in place of Adv tax repeatedly. in that scenerio, 234B is automatically attracted. i want to know, can tax dept take any other action (penalty/prosecution) against him.