Automatic Account Determination During MIGO

Dear Sir,

During the MIGO , system post a FI voucher and in this voucher GL determination happens automatically . In the posted Voucher , Store GL get Debited and GR/IR GL get Credited . The Store GL determination is based upon the Valuation Class of the material .

Sir , my query is that in SAP how does the Automatic GL determination takes place . If possible pl guide me that what configuration setting / steps need to be followed for Automatic GL determination to take place .

Regards

B Mittal