Charge of income-tax applies to total income of every person, requiring withholding and advance payments. Charge of income-tax is on the total income of each person for a tax year where a Central Act prescribes rates, and includes any additional income-tax; where the Act provides for charging tax for a period other than the tax year it shall be charged accordingly. For income so charged, tax shall be deducted or collected at source or paid in advance as provided under the Act.