Hello there, @primrosebookkeep.
You can add an opening balance to your bank account in QuickBooks Online through a bank deposit as explained below or by creating a journal entry against the bank account on line 1 and the opening balance equity(sometimes named retained profits balance forward) chart of account.
Here's how:
- Go to +New, then choose the Bank Deposit.
- Select the correct bank account.
- Backdate the deposit to reflect the opening balance.
- Leave the Received From blank.
- In the Account field, select Opening Balance Equity.
- (Optional) Enter a memo, such as "Opening Balance".
- Enter the appropriate amount.
- Select Save.
For more reference, you can check out this article: Entering a bank account opening balance.
Please let me know if you're referring to something else or have other questions. Have a good day!