Miro Bapi Extansion Solutions

Hello Experts,

I'm using BAPI_INCOMINGINVOICE_PARK FM at MIRO process.

I see Text(sgtxt) field at original MIRO screen "Multiple Account Assingment For Item .." .

But I don't want to use Text(sgtxt) field with bapi.

There isnt this field in "ACCOUNTINGDATA".

How can fill this field using with "EXTENSIONIN".

Best regards.