If you are viewing an existing transaction, this field indicates whether or not the system used automatic counter-balancing.
If you are adding a transaction, and if you have set up a counter balance account for this account in the Chart of Accounts Maintenance window, you should accept the automatic counter-balancing.
Note: If you didn't set up a counter-balance account for this account, the system will not allow you to enter a Y in the Counter Balance box. You should accept the default of N.