You've come to the right place for help. I'll be happy to asssist with adjusting the beginning balance on your account.
QuickBooks Online makes it easy to edit an incorrect opening balance and I'll be happy to show you how.
Go to Settings ⚙️, then select Chart of Accounts.
Locate the account, then go to the Action column and select Account history.
Find the opening balance entry. Tip: If you've got the Date column sorted from newest to oldest, the opening balance entry may be at the end of the list.
Select the opening balance entry.
Edit the amount. Tip: If you're not able to edit the amount directly on this screen, in some cases you can edit by selecting the Edit ✎ icon.
Select Save. Your change will not be saved if you navigate away from the register without saving.