This article has a training video for Channel Partner Stock Release Later Process  in COMPAS Go. 

Why Release Later?  Because you want to.  Because you needed to order product to satisfy the required “Bank” Quantity. Or any other reason you might want the rebate request process to be applied later.  

In the last video we talked about Export. Export provides detailed line-item pricing information.  Because we selected Release Later, we now need to Reapply Fulfillment to process the Rebate Credit. Release Later is selected for different reasons. One of the reasons can be to replenish a out of stock item. If so, make sure the item was shipped and invoiced before Reapplying Fulfillment.