You just need Form – 16, if you are a salaried individual. No other document, like a TDS certificate, proof of investment, needs to accompany your ITR. Still, you must keep them handy, as you may need to submit to authorities if they ask for it.
When you don’t get Form-16, given below is a list of documents that you may have:
(a) Copy of the previous year’s tax return (to declare any losses or other details),
(b) Your Bank statements (for the interest paid to your loans, balances, etc.),
(c) Your TDS certificates (to include taxes that have already been paid),
(d) Your Savings Certificates, Deductions, Donations, etc. (to include deductions),
(e) Certificates of Disability in your family (for deductions),
(f) An Interest statement that shows the interest paid to you, (possibly from Bank and/or Post Office),
(f) If having business income/loss, have balance sheets, Profit & Loss account statements, and other requisite Audit Reports.