Hello there, scubajon00.
I'm here to help resolve this issue with your bank account number in QuickBooks Desktop.
Let's run the Verify Data Utility tool. This way, we can check if it's a data issue. Verifying and rebuilding your company file resolve unexpected behavior like this.
Below are the steps on how to do it:
Or you can follow these steps to rebuild your data:
Once done, try checking your the bank account number again and see how it works.
For more detailed instructions, I’d recommend checking this article: Resolve data damage on your company file.
Let me know if you've got the chance to try the steps above. I'm always here if you need more help.