Generate Statements Missing Open Transactions

Navigate to Transactions > Customers > Generate Statements

Remove the value in the Start Date field
Note: If you do not include a start date, the statement includes all open transactions in your customer's history.

Check Show Only Open Transactions
Note: The Show Only Open Transaction option is most useful for statements printed as of your current today's date. If you select Show Only Open Transactions and are using a date other than today's date, you may have balance discrepancies.