In Selling Profile for sections "Payment", "Shipping", "Return Policy" you can select use information created on ebay site named "Business Policy" or set value inside Selling Profile (classic way).

Ebay does not allow using mix selection. For example, if you select Business Policy (BP) in Payment section you "must" select BP in Shipping section and also in "Return Policy" section. If mix data ebay can response with error "Internal Error to Application".