Assign Item Category in SAP
Step 1: SPRO=>IMG Reference=>Sales and distribution=>sales=>Sales Documents=>Sales Document Header=>sales document Item Category=>Assign item category.
Step 2: Double click on “Assign item categories”. In a new window, click new entries and enter the mandatory fields such as Sales document type, Item category, Item Category Group, Manual item category, etc.
Step 3: Now click on the save icon to save configured data.