I've replicated your concern and could see the invoice number when previewing and printing checks in QuickBooks, Rrstclair. Let's work together through some troubleshooting steps to ensure you can print your checks successfully.
The outdated stored cache can affect the program's performance. I recommend accessing your account using a private window to determine whether this is a browser cache-related issue.
Here are the keyboard shortcuts:
Safari: Command + Shift + N
Google Chrome: CTRL + Shift + N
Mozilla Firefox or Microsoft Edge: CTRL + Shift + N
Then, print the check again with the invoice number. If it works, clear the browser's cache. Doing so deletes all the data from your browser and optimizes its performance. You may also use other supported browsers as an alternative.
If you have additional questions about printing checks or any concerns about QuickBooks, click the Reply button below. I'll be willing to lend a hand. Have a good one.
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