Hi hhyatt,
Welcome to the Community. Being able to run payroll is essential to ensure that your employees are paid. QuickBooks Online Payroll is a great program that gives you the ability to pay your employees and track your payroll remittances. I'd be glad to help.
If you have already run payroll, the payroll bank account for this paycheque cannot be changed. You can create a journal entry to transfer this paycheque to the correct account. If you'd like to change the payroll bank account for future paycheques, I encourage you to select the Settings icon, then Payroll settings > select the edit icon next to Bank accounts > follow the prompt and edit your payroll bank account.
Should you require additional assistance, please don't hesitate to contact our QuickBooks Online Payroll specialists, outside of Community.
Let me know if you have questions, I'll be happy to help.