If you’re reconciling other types of accounts for the first time, review the opening balance. It needs to match the balance of your real-life bank account for whatever day you choose to start tracking the account in QuickBooks.
Here's how to start your reconciliation:
Go to the Gear icon, then under Tools, select Reconcile. If you're reconciling for the first time, select Get Started first, and then Let's do it.
From the Account ▼ dropdown menu, select the account you want to reconcile.
Check the Last statement ending date. Make sure your bank statement starts the day after your last reconciliation.
Review the Beginning balance. Make sure the beginning balance in QuickBooks matches the one on your bank statement.
Enter the Ending balance and Ending date as they're written on your bank statement.
When you're ready to start, select Start reconciling.
To know more on how to reconcile accounts in QuickBooks Online, here are some helpful articles you can check: