I can help you reconcile your account in QuickBooks Online, MEL7111.
Reconcile one bank statement at a time each month. The beginning balance will be incorrect when an opening balance was entered incorrectly or was not entered during setup. Since this account has not been reconciled, you’ll have to check your register to see if any transactions were mistakenly reconciled and make the necessary corrections. Please check our detailed guide on reconciling an account in QBO.
I've attached some articles below for additional reference:
I'm always here if you have any other questions regarding reconciling accounts in QBO.
