For effective GST return filing, several key documents and pieces of information are essential. 1) E-portal login ID & password: Firstly, you need to have your e-portal login ID and password to access the GST portal. 2) GST registration certificate: Additionally, possessing the GST registration certificate is crucial as it verifies your registered status. 3) Digital Signature ... https://legalterminus.com/registrations-returns/return-filing/gst-return-filing/