How do I find out where a SUB or IDT billing came from? From the University Controller’s Office website, under Cash Management and Banking Policies, Procedures, & Guidelines, select SUB/IDT Journal Masks. For further information, please contact ncsucashmgmt@ncsu.edu. Updated on February 15, 2022 Tagged: BillingcontactIDTjournal maskSUB Was this article helpful? Yes No Need Support?Can't find the answer you're looking for?Contact Support