There may be times when you find you are missing a code in your custom billing template(s). These can be added at any time. To add codes, go to:
3. Under the first section "Billing Item Template", select the GEAR button
4. Select the CODE button under the desired Billing Template
Once you have selected the CODE button, you can now create custom codes for that template.
You will need to create a custom template if you are wanting to create custom codes, by following these instructions: