You might have paid some bills by authorizing an ACH withdrawal from your bank account, or you might have used a peer-to-peer wallet (PayPal, Venmo, etc). If you paid bills without using bill pay, you can reconcile the payment manually.
Go to Activity from the Banking menu, find the payment transaction, and tap it to open the Spent Money screen. Choose the contact from the spent money screen. To open the category list, tap the category.
Select the category with your contact's name in the Prepayments To Contacts Group (1210), under Other Short-Term Assets. You can do so by using the search bar or changing the Category Type from the shortcut menu to Other Short-Term Assets.
You can apply the prepayment to the amount you owe now that you've reconciled this payment as a prepayment to your contact.
Go to contacts from the accounting menu and find your contact.
Tap the bill pay button from the contact profile. Your prepayment will appear in the They Owe section.
Select your prepayment first, followed by the entries that have been paid in the You Owe section.
Use up the prepayment until the pay button displays $0.00. Tap the pay button, confirm, and you're done!