how to create discounts using BAPI_ACC_INVOICE_RECEIPT_POST

Hi Experts,

By Using "BAPI_ACC_INVOICE_RECEIPT_POST" am unable to pass the values to "bapiaccr01-amt_base" to get the discounts in FB03 screen . Or is there any other way to update / pass the disc_base and amt_base field values using this BAPI.

Many Thanks for you time.

thanks ,

Bhaskar.