Updating a billable item is very simple.
Once you've found the item, on the far right hand side of the results table is an "Actions" button. Clicking on this will show a drop down menu. From the list, click on "Edit".
On the edit page, you will be able to change any information, however fields marked with an asterisk (*) are required and cannot be left empty.
Once you are finished making your changes, click the Update Billable Item button to save your changes.