All you need to know about CDS-based value helps in S/4HANA

Adding a value help to a field

@Consumption.valueHelpDefinition: [
    { entity:  { name:    'C_SalesOrganizationVH',
                 element: 'SalesOrganization' }
}]
SalesOrganization;

Add the following annotations to either your projection view or its metadata extension

Finding a standard value help

Search in the ADT with the search string:
type:ddls *[ObjectName]*VH.

type:ddls will limit the result to objects of type data definitions (cds views and entities).

In this case i searched for *Sales*Org*VH to find the relevant cds views for the business object Sales Organization. The name can often be derived from the english translation of the data element the field is using.

💡 Hint
To find released value help cds views only, add the filter api:use_in_cloud_development as well.