Hello ADJOINTE,

Please open the account reconciliation window in Sage 50 and take note of the "Statement Start Date" on your current reconciliation period. Then go to (Reports -> Banking -> Account Reconciliation Report). Select your bank account and select the option to report by "Statement End Date". On the date range field, select the 1 day prior to the "Statement Start Date" that you took note of on the first step then click OK to generate the report.

When you open the Reconciliation window and enter the account number the Start Date is always one day after the last reconciliation. This date should be October 1 if you completed and posted the September 30th reconciliation. If it is not October 1, you possibly did not post the September reconciliation or you had a different date than September 30 as the statement closing date.