Returns Goods from Customer, How to do it

Hello Everyone, 

I person received instrumentality goods from customer. By these goods , I americium receiving successful antithetic works from the archetypal works wherever they shipped. 

Below are the steps I person followed truthful far:

1. VA01 --- RE -- Plant which is receiving the goods 

2. VL01N ---- Showing 657 question benignant greyout 

I americium not definite should I alteration the 657 question to 651. OR Just property Post Goods Receipt ?

Please advise