I can't generate a 90 day statement for a particular client even though I change the date parameters

Welcome and thanks for posting in the Community, @malcolm8.

If the dates are already correct, the browser's cache and cookies may be causing this odd behavior. In this case, try signing into your QuickBooks Online (QBO) using a private browser (incognito).

Here's how:

• Press Ctrl + Shift + N (Google Chrome).
• Ctrl + Shift + P (Firefox).
• Control + Option + P (Safari).

Once logged in, try to generate your client's bank statement again to double-check. If it's successful, return to your default browser and perform a clear cache to refresh the system. However, if the issue persists, try using other supported browsers.

In case you'll need to pull up some custom reports for your clients, you can refer to this article for further guidance: Run reports in QuickBooks Online.

Please let me know if you have any other questions or concerns in the comment section. I'll be more than happy to answer them. Have a good one!