SD commonly used BAPI of SAP SD basic knowledge
Create a sales order: BAPI_SALESORDER_CREATEFROMDAT2
Create a return sales order: BAPI_CUSTOMERRETURN_CREATE
Generate delivery order according to sales order: BAPI_DELIVERYPROCESSING_EXEC
Modify outgoing delivery order: BAPI_OUTB_DELIVERY_CHANGE
Modify inward delivery order: BAPI_INB_DELIVERY_CHANGE
Delivery order delivery posting: WS_DELIVERY_UPDATE
Invoice for VF01/VF04: BAPI_BILLINGDOC_CREATEMULTIPLE