Add a new Field "Return - Content Type" in the Report Setup
I believe that the returning of documents should be as flexible as possible. This means that a returned document does not necessarily have to be deposited in the content type that has been set up, but that, for example, documents signed by the customer could be automatically deposited via BarSplit in a separate content type (e.g. signed documents) in the document library.
So the goal is to define a new content type for the document return per report in the report setup, which can also be changed again by the administrator at any time.