Hello and welcome to the Community, geraldine-seah-s. We'll be happy to share some guidance on managing payments in QuickBooks Online.
To reverse a payment that was allocated from a connected bank account, simply follow the steps below:
1. Go to Transactions and select Bank Transactions (Take me there)
2. Select the Bank tile for the relevant bank account
3. Click on the Categorised bank tab
4. Search or scroll to locate the payment
5. Click Undo
The transaction will be moved back to the For review bank tab where you can use the Match function to allocate it against the correct invoice.
Thanks for reaching Intuit support. We're just a post away if you have further questions or require additional assistance.