Hi Avideh,

Welcome to Community!  Based on the information you've provided, it seems that QuickBooks Online has determined a possible credit note that may have been created previously.  I'd be happy to help you with this!

If there's an existing credit note, when you go to pay bills for that supplier, QuickBooks automatically applies it to the bills.  If you meant to pay the bills in full, you can just remove any credits that have been applied.  I'll walk you through the steps!

1. Go to the +New icon and then Pay Bills

2. Checkbox the Bills to be paid 

3. In the Credit Applied column, remove the amount to Zero it out

4. The Payment amount will automatically adjust

You can also manually change the payment amounts for each bill.

When you're ready, be sure to hit Save and Close in the bottom right corner.

If you need additional assistance or have any other questions, please don't hesitate to reach back out.  We're glad to assist!