Here is a full list of the chords recognized by Band-in-a-Box. The chord names have to be entered exactly as shown here. Alternative spellings for the same chord type will not be recognized. https://www.pgmusic.com/tutorial_chordlist.htm

This video also goes over entering chords into Band-in-a-Box: https://youtu.be/rAKw4ZPOK_c

Instead of typing in the chord names, you could alternatively use the Chord Builder window. Right click the bar you wish to enter a chord, then select Chord Build in the menu.

Best,
Chantelle