Screens 38.2 and 38.3 are where you'd make your input.  Individuals reported on these screens will flow through to Part VII and not counted as voting members.

Individuals you enter on Screen 2 whose income should be input on Screen 38.1, on the other hand, will be counted as voting members.  If you need to override the count, you will need to enter your own number on Screen 6 on the line for "Number of voting members of governing body (1a) [O]".