Hi alex-huffleyfarm,
You can run a supplier and customer contact list from the reports section, this will show details of all active debtors/creditors. Unfortunately there is no way to view this at a specific date, to get this information you would need to run a separate report such as the customer balance summary report, and enter a custom 'as of' date. This will then only show debtors with a balance at that specific period. For creditors, you could run the expenses by supplier summary and again customise the date to a specific period.