Credit balance in Balances accounts. How to reclassify the same to Liability.

Hello Experts,

Presently in the Bank Balances we have the Credit balances sometimes due to Overdraft.  In those circumstances it should not be shown under Current Asset.  Effectively to be transferred to Current Liability.

In the GL Extract or the Flat file load to BPC, it will come with the original account with the negative balance. How to make this account balance to Zero and post to the Contra account in Liability automatically?

Thanks,

Regards,

Ram