Tax deduction at source on salaries: prescribed rates, employer duties, perquisite valuation and TDS compliance for payroll. Deduction of tax at source under Section 192 requires employers to estimate salary income for the year, compute tax at prescribed slab rates, deduct tax on average at each payment, and account for employer-paid tax on perquisites as deemed TDS. Employers must maintain records and furnish TDS certificates (Form No. 16 and Form No. 12BA where applicable), take employee declarations (Forms 10E, 10BA, 12C), apply standard and Chapter VIA deductions when estimating taxable salary, and follow detailed valuation rules for perquisites; non-compliance attracts interest, penalties and prosecution.