Enhancement: Introduction of the HUD1 screen. Hud-1Worksheet code fields: By clicking on the "code" fields, this will enable you to input other HUD1 line items. Choose either series 100, 200,400 or 500, to add additional line items. Series 300 and 600 are not editable fields and cannot be accessed. These series fields sole purpose is to tabulate all information from new HUD1 line items that are added to the 100,200,400 and 500 series boxes.