1. Log in to the GST Portal

  2. Go to  Services > Registration > Application to Opt for Composition Scheme

  3. The screen business details like GSTIN, legal name, jurisdiction etc

  4. Go to Composition Declaration tab. Click on the check-box

  5. Click on the Verification check-box

  6. Select Authorised Signatory and enter place. Submit with DSC or EVC

  7. The screen will display a Success message. An ARN is generated and sent on registered e-mail and SMS

Read more - How to opt For Composition Levy on GST Portal?