In Zedonk a Return Authorisation is created from a Delivery Note. If you have the Multi-Location feature enabled and you decide to accept the return and bring it back to your stock, you will need to specify to which location you want to return stock.
CUSTOMER: Customer Primary Address.
SHIP FROM: Customer Delivery Address from the Delivery Note.
SHIP TO: 'Returns Ship To Address' set into Settings > Company Details
CONTACT INFORMATION: Customer contact from the Delivery Note.
SHIPPER and SHIPPING TERMS: Blank. For you to fill.
Complete any other missing information you need on the Return Authorisation.