What Are We Trying to Accomplish?
When you have an items showing up in the matching or mismatch tab, but the you cannot pick the line item that you want to choose.
How Do I Do It?
1) Click on the "Needs Review" tab and choose the dropdown with the lightning bolt
2) Click on "Pick Line"
3) When the pop up comes up, you will want to look at "Qty Ord.", "Qty Rec.", and "Qty Vouchered"
In this instance the line cannot be picked because it has already been vouchered in full. In this case you would want to:
1) Back on the main "Needs Review" tab, you would click on the lightning bolt
2) Choose "delete" as the line has already been vouchered in full - this will remove it from this view.