Each supplier must be linked to a supplier group within which an account of the chart of accounts is associated with, this is termed as a supplier control account or creditor control account. In a default company setup these are already created for you.
Normally there is only one supplier control account which, in a default setup is 2100 nominal code within the balance sheet. However, you can create additional one should you so wish. The balance of all supplier invoices and their payments are posted to this account so you can see any one time what the position is as to how much you owe your suppliers.
You can check this account by running the financial ledgercard report for account 2100 which will show each individual transaction supplier invoice and payment recorded.
You can also run the supplier ledgercard which can by run by individual suppliers or supplier groups showing the activity for these...