INVOICE_NUMBER - Multiple invoice numbers may be included in the same bulk invoice if SpeedPost is used.
CLIENT_ID - This is the client number for your time and billing system.
LAW_FIRM_MATTER_ID - This is the matter number for your time and billing system.
LINE_ITEM_TASK_CODE - Unless your client requires task codes for a trademark or patent matter, you can leave this field blank.
LINE_ITEM_EXPENSE_CODE - See list of UTBMS codes for this expense line item. The expense code for any expense or any invoice-level adjustment to expenses must be included in your invoice that you submit.
LAW_FIRM_ID - If your firm doesn't have a federal ID, enter None.