Hi @TOver ,

You can follow the below steps

1. Go to the purchase order receipt and enter the inspection quantity (will be automatically fetched if you have specified this against the supplier for part) 
2. this will change the status of you receipt to To be Inspected
3. Now click on Register inspection result ( you can find this option using RMB , if you are not in cloud version)
4. Click on the return tab and enter the quantity you want to return, return type & receipt return type 
5. if you have chosen receipt return type as Return to Rework , then you can receive the quantity back through register arrival screen.

Above is the simple rework flow and attached the detailed quality inspection flow for your reference.

Hope this helps!!

Regards,

Mithun K V