To check whether has opted in for Composition Scheme or opted out of Composition Scheme, follow these steps:

  1. Login to GST Portal 

  2. Click on Services > User Services > Search Taxpayer Opted In/Out of Composition

  3. Select Opted In or Opted Out from the dropdown

  4. Search using GSTIN - Enter GSTIN and captcha code. Click on Search

  5. Search using State - Enter State, Financial Year and Legal Name. Click on Search

Read more - Check Taxpayers Composition Scheme Status on GST Portal