When invoices are created in TLU Portal, there is an auto-generated Invoice number that is created and displayed in the first column - see Figure 1 below. This number can be edited to match your accounting records!
First select the Invoice you want to update – this will open the Invoice.
Click on Update Invoice
Add a number to the Ext. Number field
See Figures 2 and 3 below for the steps involved to edit the Invoice Number.
Note: There is currently no option to add the Ext. Number when initially creating the Invoice. This step must be completed once you save the invoice, then you can select Actions > Update Invoice > then add a new Invoice number to the Ext. Number field.