To file your income tax return, it is vital to know why Form 16 and Form 26AS is important. Form 16 is a TDS certificate which an employer provides his employee every financial year. Form 16 has 2 parts—Part A and Part B. Part A contains details, such as tax deducted from salary by the employer, Permanent Account Number (PAN) of the employee, and TAN of the employer. Similarly, Part B consists of information about salary break-ups including exemption allowances and prerequisites. Form 26AS is a