[IMP]Account:Onboarding accounting screen

Hello,
Onboarding accounting screen.
More details:
Task link :-  https://www.odoo.com/web#id=9088&view_type=form&model=project.task&menu_id=3942&action=327
Pad link :-  https://pad.odoo.com/p/r.bL3dXcRHoE0O9tMk

Thanks,
ssh-odoo

What is that field ?