We just need about how to use this badi EDOC_MX_TRANSPORT_COMPLEMNT_V4.
We need how to fill some fields, that are mandatory for Mexico.
For "Carta Porte" SAP provides a BAdI in app "Custom Logic" - "Mexico: Filling of Transportation Complement V4.0" to complement the solution for this legal requirement. The mappings of the fields to this BAdI depends on the solution in place for your customer.
Also have a look on the links below: