If you’ve stated to use AX2012 you’ve probably trying to create a new company but Company Accounts Form is no longer where it used to be. Previously in AX2009 it was available under
Administration -> Common forms -> Company Accounts
In ax 2012 it has been renamed as Legal entities .You can now find the Company Accounts Form as Legal entities in AX 2012 under
Organization administration -> Setup -> Organization-> Legal entities.