How to I apply unapplied payments to bills.?

Welcome to the Community, @meagan4. I can provide some information about how you can record unapplied payments to bills in QuickBooks Online (QBO).

When you see the Unapplied Cash Bill Payment Expense on your Profit and Loss report, take the following steps:

1. Open the Profit and Loss report, find the section Unapplied Cash Bill Payment Expense.
2. Click on the total amount. Take note of the supplier and the amount for each bill payment.
3. Select + New, then Pay bills.
4. If you see bills matching the bill payments in the list, select the checkboxes and then Save.
   
   

For your reference, read through these helpful articles to learn more: 

• What's Unapplied Cash Payment?
• Enter billable expenses.
  
  

Please feel free to post an update below if you have additional questions. I'll be more than happy to help you at any time. Take care and have a great day!