Hello Dwight Wheeler
Please let me know what error you are receiving. You may also look at this related Q&A Post about the same problem.
Unable-to-delete-an-azure-b2c-tenant
Sign in to the Azure portal as the Subscription Administrator. Use the same work or school account or the same Microsoft account that you used to sign up for Azure.
- Make sure you're using the directory that contains your Entra B2C tenant. Select the Settings icon in the portal toolbar.
- On the Portal settings | Directories + subscriptions page, find your Entra B2C directory in the Directory name list, and then select Switch.
- In the left menu, select Entra B2C. Or, select All services and search for and select Entra B2C.
- Delete all User flows (policies) in your Entra B2C tenant.
- Delete all Identity Providers in your Entra B2C tenant.
- Select App registrations, then select the All applications tab.
- Delete all applications that you registered.
- Delete the b2c-extensions-app.
- Under Manage, select Users.
- Select each user in turn (exclude the Subscription Administrator user you're currently signed in as). Select Delete at the bottom of the page and select Yes when prompted.
- Select Microsoft Entra ID on the left-hand menu.
- Under Manage, select Properties
- Under Access management for Azure resources, select Yes, and then select Save.
- Sign out of the Azure portal and then sign back in to refresh your access.
- Select Microsoft Entra ID on the left-hand menu.
- On the Overview page, select Delete tenant. Follow the on-screen instructions to complete the process.
Reference documents: Cannot-delete- B2C Tenant
Azure AD B2C: Frequently asked questions (FAQ)