Bring up a patient with a Medicare card and click Bulk Bill.
Choose a servicing provider.
Change the service date (will default to today, or if billing from appointment book the date of appointment).
Type in an item number.
You may need to optionally fill in time, or add various codes from drop-down.
The fee selected should be the rebate amount, i.e. typically 85% of MBS schedule for out patient, 75% for in patient. If it is wrong you can manually change it. Note: Medicare will pay the correct amount and it will be adjusted later - but best to have it right if you can.
Once you have added all of the items you want click OK.
You can optionally print a DBAA form to give to the patient.