Hi there, FMWjen.
Since only one vendor is associated with this account, I would suggest running an account report. This will show you all the transactions of the vendor that used this account.
- From the Lists menu, select Chart of Accounts.
- Right-click on the liability account and choose QuickReport [account name].
Based on what I've replicated, you may not be able to see your bill payments in this report since a bill payment's posting accounts are Bank's (or credit cards) and the Accounts Payable. But, this will show you your liability balance. And, depending on how you create bills, they should reduce the balance if you used this account on them.
Please let me know if you have other questions with the report.