In order to install the Bills module, you must install the Inventory Add-On extension from the extension store.
Follow these steps to install the extension:
- Click the User Menu on the top right corner of the screen.
- Click the Settings button.
- Search for Extensions column.
- Select Extension Store.
- Search for Vtiger Inventory.
- Click Install.
The Bills module along with other modules will be installed in the Inventory tab.
To know more about Bills, click here