Hi there, DLSesq.
Thanks for turning to the Community for support. I'm happy to relay some info about changing an account balance in QuickBooks Online.
When editing account balances it's always a good idea to check with your accountant first. If you don't currently have an accountant you can find one in your area specifically trained in QuickBooks by searching here: Find a ProAdvisor
In this instance, you may consider editing the opening balance of the account. This can be done in a few steps. Here's how:
1. Go to Settings ⚙ and select Chart of accounts.
2. Locate the account and select View register.
3. Find the opening balance entry. Tip: Sort the date column to show the oldest entries first.
4. Select the opening balance entry.
5. Edit the date, then the amount. If needed, select Edit to make your changes.
6. Select Save.
The following article provides additional info about entering and managing opening balances in QuickBooks Online.
Please don't hesitate to reach back out if you have any other questions. I'll be here to help in any way that I can.