This discussion clarifies when employers must deduct Tax Deducted at Source (TDS) on employee salaries. Even if an employee's total tax liability is zero after deductions and rebates, TDS is still mandatory if their gross salary exceeds the basic exemption limit. The rate for TDS deduction is calculated based on the employee's projected tax liability for the financial year. Regarding business turnover, while an audit isn't mandatory for turnovers between £60,000 and £1 million, maintaining proper books of account is advised.