How to stop credit card transactions being duplicated in my sales income account

Which payment processor do you have? QB Payment or else?

Let me help you handle the duplicate credit card transactions in QuickBooks Online (QBO), bryan37.

If this duplicate credit card transaction is downloaded from your bank, you can exclude it from the Banking page. Here's how: 

1. Go to the Banking menu on the left panel.
2. Choose the Banking tab.
3. Check the box beside the transactions you want to exclude.
4. Click the Batch actions drop-down and choose Exclude Selected.

I've got here a reference that you can bookmark to guide you in excluding bank transactions: Exclude a bank transaction from your expenses in QuickBooks Online. To manually create this transaction, you can go to your bank register and delete it from there. Let me guide you on how.

1. Go to the Gear icon, then select Chart of accounts.
2. Select the bank account and click View register.
3. Locate and select the created credit card charge. Then, hit Delete.
4. Press Yes to confirm.

You might want to learn more about processing credit card payments in QBO. This article will help you through the process: Process a credit card payment in QuickBooks Online. To handle duplicate credit card transactions to maintain accurate records and prevent items from populating in Problems to be Resolved when recording your deposits, check out this article: Handle duplicate credit card transactions in QuickBooks. 

Just in case you need to use bank rules to automatically categorize transactions from your bank, feel free to refer to this article: Set up bank rules to categorize online banking transactions in QuickBooks Online.

You can also review the topics from this link for extra resources while working with your bank transactions in the future: Find help with bank feeds and reconciling accounts.

If you have any more questions about managing your bank transactions, please don't hesitate to contact us here. Your satisfaction is of utmost importance to us. Keep Safe!