There's no doubt that you'll never put your financial data or bank accounts at risk, therefore you'll double-check everything. Otherwise, it may be a nightmare for your company. Data problems, such as inaccurate accounts or transactions, can occasionally cause a few errors. When you open a bank account in QuickBooks by accident, it pulls your latest transactions automatically. If you don't want your bank to send you new transactions, you can simply disconnect the account. Furthermore, if you want a long-term solution, How to Delete Bank Account from Quickbooks Online. There's a distinction to be made between disconnecting an account from online banking and deleting it from your account list.