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Just like how easy you connect your bank to QuickBooks Online, you can also disconnect it with ease.
Remember that disconnecting a bank account from QuickBooks will remove the downloaded bank transactions that weren't categorized. Make sure to categorize the pending transactions if necessary.
Here'show to disconnect a bank account:
After that, you can already reconnect the correct bank account.
We're always right here if you needs more help with this. Have a great day!