QB Issue Resolution:

Use designated “Credit Card Credit” form to enter credit on cc account.

From the home page screen

Select (+) plus sign (upper-middle)
Select “Credit Card Credit” under Vendors

Resolution for Issue 'How do I create a credit on a credit card account?' available: Yes (Solved).
Source: Intuit Community forum.

How do I create a credit on a credit card account?: 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 Credit Card
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Error Recovery for Credit Card [Canada]
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