Advance tax liability on current income requires advance payments, with a senior resident exemption for non business income. Advance tax is payable during a financial year on the assessee's total income chargeable in the immediately following assessment year, termed current income, in accordance with the Chapter's advance tax provisions; however, this obligation does not apply to a resident individual who has no income under 'Profits and gains of business or profession' and who is sixty years or older during the previous year.