But before we get started, did you happen to encounter any error messages while trying to create a statement? If yes, would you mind if I ask what specific error did you get? This is for me to be able to provide you with an appropriate solution based on the error you're getting. Any additional information or a screenshot will be much appreciated.
While waiting for your reply, let's perform some troubleshooting steps in the meantime to check if this is a browser-related issue.
First, let's log in to your account using a private browser and create a statement to check if it was caused by temporary internet files.
However, if the same data appears on the statement even when using a private browser, you'll have to switch to another browsing application. Here's a list of supported browsers:
We'll be here in case you have additional questions with regard to managing your customer statements in QuickBooks Online. Assistance is just a reply away. Take care.