It is the certificate of tax deduction at source (TDS) on salary income by employer and submitted by them to the Income Tax Department (IT Department)
It shows how much tax an employer has deducted on the salary of the employee
Any salaried person irrespective of the fact whether your income falls under tax exemption limit or not, the employer must issue Form 16 if they have deducted TDS
Form 16 is an important document to file the IT return. It is the proof that an employer has paid the TDS to tax authority
Employee should receive form 16 on or before May 16 of the assessment year
Form 16 has 2 components Part A and Part B. Your income details are bifurcated into these 2 parts