Addition of Fund Center field in "ACCOUNTRECEIVABLE" table in BAPI BAPI_ACC_DOCUMENT_POST

Dear Gurus,

I have a requirement. I am using bapi BAPI_ACC_DOCUMENT_POST for posting purpose. In this BAPI, in ACCOUNTGL table, there is a field "Fund Center". But my requirement is like that, i need this field on customer level, which means i need this field in table "ACCOUNTRECEIVABLE" table. Can anyone tell how it can be done? Can extension table fulfill this purpose? What other way we can do this?

Thanks in advance.

Regards