Integrating WHMCS with WHM (Web Host Manager) for billing automation is a common practice for web hosting businesses. Here's a general overview of the steps you might take to integrate the two systems:

1. Install WHMCS: If you haven't already, install WHMCS on your server. You'll need to follow the installation instructions provided by WHMCS.

2. Obtain WHMCS License: Make sure you have a valid license for WHMCS. This is necessary for full functionality and support.

3. Configure WHMCS: Set up your products, services, pricing, and billing cycles within WHMCS. This includes creating hosting packages, domain registration options, and any other services you offer.

4. WHMCS-WHM Module: Install a WHMCS module that allows integration with WHM. There are several modules available for this purpose, such as cPanel Extended for WHMCS, which enables integration between WHMCS and WHM.

5. Configure WHMCS Module: Once the module is installed, you'll need to configure it with your WHM server details. This typically involves providing the WHM server's IP address, root login credentials, and API access details.

6. Test Connection: After configuring the module, test the connection between WHMCS and WHM to ensure they can communicate properly.

7. Sync Products and Services: Sync the products and services from WHM to WHMCS using the module. This will ensure that the packages you've created in WHM are available for sale in WHMCS.

8. Automation Settings: Configure automation settings within WHMCS to handle tasks such as account provisioning, suspension, and termination based on billing cycles and customer actions.

9. Billing Integration: Ensure that billing integration is set up correctly so that WHMCS can generate invoices, process payments, and handle recurring billing for your services.

10. Testing: Thoroughly test the integration to make sure everything is working as expected. Test account creation, suspension, termination, and billing processes to ensure smooth automation.

11. Monitoring and Maintenance: Regularly monitor the integration to ensure it continues to function properly. Keep an eye on any updates or changes to WHMCS, WHM, or the integration module, and update as necessary.

By following these steps, you should be able to integrate WHMCS with WHM for billing automation, streamlining your web hosting business processes and improving efficiency.