I'd love to help you reconcile your credit card in QuickBooks Online (QBO).
To be able to do so, I'd like to ask a few questions to help me better understand the situation. May I know what specific issue are you having with the credit card reconciliation? Can you tell me more about it?
For now, let me share the most common factors for discrepancies in reconciliation. Among these are the following:
Duplicate transactions.
Transaction was associated to a different bank account.
Previously reconciled transactions were modified or deleted.