@JeetChaudhari-9400
I'll post the summary of your issue below.
Issue:
Can't delete seat-based subscription to delete an azure active directory.
Troubleshooting:
Doc followed - Delete a tenant in Azure Active Directory
- AzureAD Admin Center, Azure Portal, Microsoft Store For Business, and Microsoft 365 Admin center, didn't show a subscription to be deleted.
Recommended Steps:
Since this required further troubleshooting, a Support Request was created.
RCA:
There was a “WINDOWS_STORE (trial) subscription” under the Tenant that you provided.
Solution:
Support had to collaborate with internal resources to manually remove this subscription. (~3 day period after deletion for it to update on your Tenant).
Thank you for your time and patience throughout this issue.
If any reply/answer helped resolve your question, please remember to "mark as answer" so that others in the community facing similar issues can easily find the solution.