Maintenance Overview From the Site Map, click Accounts Receivable , and then click Maintenance. The Maintenance list displays. Change Order Status File Maintenance Change Request Status File Maintenance Contracts Contract User-Defined Fields Maintenance Customers Customer User-Defined Fields Maintenance Invoice User-Defined Fields Maintenance Item Description/Message Maintenance Pricing Add-On Maintenance Sales Tax Code Maintenance Salesperson Code Maintenance Set Up Unit Price Billing Items Terms Code File Maintenance Transaction Code File Maintenance Unit Of Measure File Maintenance