How to create custom fields in billing documents

[SAPSupport]

Customer wants to know how to extend custom fields in billing documents.

------------------------------------------------------------------------------------------------------------------------------------------------
Learn more about the SAP Support user and program here.

[SAPSupport · Accepted solution]

To extend custom fields in billing you can do it via extensibility. Please refer to our SAP help portal page:

Help Portal:

App Extensibility: Billing Document
Making UI Changes (Object Pages)