Question: what documents do you need to file income tax return?
Answer: Form-16. If you are a salaried person, this is one of the most important documents for you to file your ITR. ... 
Salary slips. ... 
Interest certificates from banks and post office. ... 
Form-16A/Form-16B/Form-16C. ... 
Form 26AS. ... 
Tax-saving investment proofs. ... 
Deductions under section 80D to 80U. ... 
Home loan statement from bank/NBFC.