QB Issue Resolution:

There was no reason to enter a bill. There is no bill. You already paid when you used the credit card. You should go directly to Bank menu, Enter Credit Card Charge. There you will see radio buttons so that you can select if this is a charge or a refund entry.

Resolution for Issue 'How do I apply a Credit Card Credit?' available: Yes (Solved).
Source: Intuit Community forum.

How do I apply a Credit Card Credit?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for card
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