Thank you for posting here in the Community, @TJ67.

Yes, you can change the bank account of your paychecks by going to the Payroll Settings section in QuickBooks Online. However, please note that it'll only change the information of your payroll moving forward.

Here's how:

1. Click the Gear icon in the upper-right corner.
2. Under Your Company, select Payroll Settings.
3. Go to the Preferences tab.
4. Hit Accounting Preferences.
5. Next to Bank Account, choose the correct cash account.

Check out these screenshots for your visual guide:

If you need to change the information on your previous paychecks, you can use the Journal Entry option. I recommend seeking expert advice from an accountant on choosing the right accounts to ensure your books are accurate.

For future reference, check out the Create journal entries in QuickBooks Online article. It also provides detailed instructions and a list of reasons to use them.

Get back to me if you have additional questions or concerns. I'll be more than happy to lend a hand. Have a great one.