Help with Payroll mapping after a payroll has been completed

How are you, CarsMetrics?

Thanks for adding an attachment to your concern.

Let me help you figure out and update your payroll information to make sure your previous payroll will be posted to the correct account. Below are things to follow to complete the process:

1. Go to the Gear icon.
2. Select Payroll Settings under Your Company.
3. Click Accounting under Preferences.
4. In the section titled Paycheck and payroll tax payments, select Edit.
5. From the Bank account ▼ drop-down, select the account you set up in your Chart of Accounts (COA).
6. Click Continue. Then, Done.

Sample screenshots:

I would like to include a reference where you can visit anytime and get further information if you do other things related to payroll in the future: Let's explore QuickBooks Online Payroll.

If you more something to ask, you can do it anytime. It'd be my pleasure to assist you more. Otherwise, you can enjoy the rest of your day. Keep safe!

Thank you for providing us a screenshot, @CarsMetrics. 

Once you’ve already processed that payroll and posted to the wrong account, you can no longer go back and update it. 

Also, please take note that you can only match transactions that have the same posting account. If you’d like to match these transactions, you can create a journal entry or record a transfer. 

Here’s how to record a transfer:

1. Go back to that transaction and update it from Match to Add.
2. Choose the Payee and Category and select Add.
3. Go to the Reviewed tab.
4. Find and open the transaction.
5. Add all the information that you need. 

Check this article for more information: Fix mismatched or miscategorized bank transactions.

I'm always here if you have any other concerns or follow-up questions. I'm always here to assist.