# 3.9 Invoices Invoices are again organized with filters and information cards. Within the main information an Invoice must be correlated with a Company/Contact and also a Sales Order (so that the information flow is complete). The relations menu gives access and enables addition of correlated data regarding the modules that appear in the list. [](https://usermanual.vtenext.com/uploads/images/gallery/2022-06/image-1655736974819.png) *Invoice details* [](https://usermanual.vtenext.com/uploads/images/gallery/2022-06/image-1655737023315.png) *Products in an Invoice* [](https://usermanual.vtenext.com/uploads/images/gallery/2022-06/image-1655737080418.png) *Invoice Total, Discounts, Shipping & Handling Charges, Rounding off*
**Organizational layout of related modules** | ||
Conversations | Notes | PDF Maker |
Activities (Calendar) | Tasks (Calendar) | Documents |
DDT | Installations | Messages |
Processes |