To correct prebills:
If there is a problem with a time ticket, edit the time ticket.
If there is a problem with the balance forward, look at the Matter Billing Activity. The sum of all billed items is the balance forward. (You have to set the billing format code to show balance forward.
If there is a problem with the advanced costs, you void checks or adjust the soft costs.
NOTE: If you find an error on the billing activity, you may adjust or delete the entry ONLY if it has been entered as a soft cost. Remember the items entered as soft costs do NOT integrate through the general ledger. Also, remember that items entered as payments received DO integrate through the general ledger.