Sales
Sales is one of the fundamental add-ons upon which other add-ons are built, and you can add your units to it.
Append To It
You can add and modify the addon through the following:
Addon Cluster
php
Obelaw\ERP\Addons\Sales\Filament\Clusters\SalesCluster::class;
You can add this cluster to any resources or pages to insert it under the Sales tab.