To return the goods, you need to open the log (menu-journal), and find a check that must be returned.
Use the filter (document type, date, etc.) to reduce the list, and as a result of a faster search.
1. When the check is found, select it, and click the right mouse button, select in the context menu - Return.
2. A return check will open. In the check, maybe not all the goods are returned, then use the Change Quantity and Remove Goods buttons to edit it. In the check should remain only the goods that are returned.
3. We press the payment or "+", return the money, the check closes.
4. We can see in our magazine our return check: