Withholding tax and advance payments operate independently of assessment, securing provisional tax credits and rule making authority.
Deduction or collection at source, advance payment, and specified payments under section 392(2)(a) operate independently of later assessment and are additional to other recovery measures; amounts remitted to the Central Government are treated as tax paid on behalf of the person from whose income tax was deducted, from whom tax was collected, or in respect of whose income tax was paid, and the Board may make rules for crediting such amounts and for attributing the tax year for credit.