Form 16 is issued annually, by an employer to an employee as a proof of salary paid and taxes deducted on it. It has two parts i.e., Part A and Part B as discussed below.
Tax returns of the salaried taxpayers for FY 2018-19 (AY 2019-20) can be filed in form ITR-1 or ITR-2. The details of income from salary, allowances exempt, deductions claimed, are in Part B of Form 16, while Part A contains the employer, employee and employment details such as PAN, address etc.
The Central Board of Direct Taxes (CBDT) has notified certain changes in Form 16.

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