IU 2 This year, Santhosh, a single taxpayer, estimates that his tax liability will be $106,000. Last year, his total tax liability was $17,000. He estimates that his tax withholding from his employer will be $37,000. 0.35 points a. Is Santhosh required to increase his withholding or make estimated tax payments this year to avoid the underpayment penalty? eBook O Yes References O No b. By how much, if any, must Santhosh Increase his withholding and/or estimated tax payments for the year to avoid underpayment penalties? Increase in withholding