Clipped from: https://economictimes.indiatimes.com/wealth/tax/9-documents-you-need-to-file-itr-for-fy-2020-21/slideshow/88052927.cms
Form-16
This provides details of the total salary paid to you less of tax exemptions that you are eligible for and tax deducted on it.
Image Source: ThinkStock Photos
Interest income, TDS proof/Form 16A
You need to provide break-up of any interest income you have from sources such as savings account, fixed deposits etc.