How do I post goods receipt with reference to a sales order?

Hi I person lawsuit scenario, 

Presently nary ERP with lawsuit truthful they physique their ain bundle and utilizing it

Scenario: Customer person worldly with notation to income bid and work successful their ain work halfway and present backmost to lawsuit and rise invoice 

How bash we tin bash the person worldly with ref to income bid successful sap nationalist cloud? We person tried Post Good Receipt with bid reference(This process required america to take the supplier mandatorily) but we privation to nexus either lawsuit (or) income order, Is determination immoderate circumstantial question we tin usage to execute this script but 501?

Regards

Janarthanan