The Create AIA Credit screen is obsolete as it has been replaced by the Delete AIA Application screen. It can be used if you need to unbill an item that was billed through an AIA application. Upon processing TRX will create a CRM marked as an advanced billing credit against the project. When creating a new AIA against the project any items that you have credit will have a "Previous Work" amount of zero. 
Enter the project number or press F9 for a list of valid projects. Check any items that you wish to credit and hit the lightning bolt to process when finished.
Page Comparison
General
Content
Integrations