When manually creating / adding Line Items to your Formitize account, you will be asked to add a Line Item Code as well. This is to assist with locating the Item easily when editing an invoice, as well as keeping track of them in your accounting software.
Line item codes are a setting in which you can choose to not be visible on your invoices, by going to the Web Portal Settings cog > Accounts > Invoices > scroll down to Invoice PDF Options.
