Tax payers would have the option to sign the submitted application using valid digital signatures. There will be two options for electronically signing the application or other submissions- by e-signing through Aadhar number, or through DSC i.e. by registering the tax payer’s digital signature certificate with GST portal. However, companies or limited liability partnership entities will have to sign mandatorily through DSC only. Only level 2 and level 3 DSC certificates will be acceptable for signature purpose.