Let me continue the help, SMT22.

Changing an account name from one of your accounts in QuickBooks Online (QBO) will affect your previously reconciled transaction.

Here's how to accomplish that:

1. In the left pane, click Accounting, then Chart of Accounts. 
2. Select Edit under drop-down arrow next to View register.
   
3. Edit the Account Name. 
4. Click Save and Close.
   

Find out more about managing Chart of Accounts by visiting these articles: 

• Edit Your Chart of Accounts.

• How to manage default and special accounts in the Chart of Accounts.

• Understanding the Chart of Accounts.

I'm just a post away if you have other questions about managing accounts or anything QuickBooks. I'm always here to help. Have a nice day.