This document provides an overview of the e-filing process for income tax returns in India. It discusses that e-filing is mandatory for companies and firms requiring an audit and can be done with or without a digital signature. It outlines the relevant notifications, forms, and circulars. It describes the different options for e-filing - with a digital signature, without but submitting an ITR-V form, or through an e-return intermediary. It provides details on the e-filing process steps and requirements for signed versus unsigned returns.