What are Vtiger CRM Workflows for Sales Returns?

Once you create a Sales Return, CRM workflows update the products stock in the Products module. It auto updates the count of products returned from customers for every Sales Return. 

Enabling UpdateInventoryProducts On Every Save workflow for the Delivery Notes module auto updates Products stock for every Sales Return.
Follow these steps to enable the Update InventoryProducts On Every Save workflow for the Delivery Notes module:

1. Login to your CRM account.
2. Click the User Menu.
3. Click Settings on the bottom left corner of the screen.
4. Look for Automation.
5. Select Workflows.
6. Select Delivery Notes from the (module) filters dropdown.
7. Enable UpdateInventoryProducts On Every Save Workflow.

Once you enable it successfully, products stock updations are automated in the Products module.