Hello there, @RW55. I'll share insights about downloading all of your bank transactions into QuickBooks Desktop (QBDT).

The syncing of bank transactions in QBDT will depend on your bank. Thus, you'll want to reach out to your financial institution (Chase Bank) to see if there are any ongoing problems with syncing your transactions to QBDT.

However, if you have verified that there's no issue from your bank, I suggest, running the Verify/Rebuild tool. The Verify will detect any damaged data, and then the rebuild will attempt to fix the damaged data detected. It also allows your QuickBooks software to refresh the data inside the company file. Make sure to create a backup copy of your company file before starting the process. If there are changes that occur, having a backup copy allows you to restore it to undo the changes.

Here's how to verify data:

1. Navigate to the File menu.
2. Choose Utilities, then select Verify Data.
3. Click OK when you see the message, QuickBooks detected no problem with your data.
4. If Verify finds an issue with your data, you'll be prompted to Rebuild Now or View Errors.
5. Click Close or View Errors and take note of the specific error message.

Next, here's how to rebuild the data:

1. Go to the File menu.
2. Choose Utilities, then select Rebuild Data.
3. Click OK if you receive a prompt to back up your company file.
4. Click OK when you get the message, Rebuild has completed, and proceed to the next step.
5. Run Rebuild Data again to make sure there are no errors.

Moreover, you can check out this article in case you encounter a specific error related to banking inside QBDT: Fix OL and OLSU Bank Feeds errors in QuickBooks Desktop.

Feel free to comment back if you need further assistance with QuickBooks. The Community always has your back. Stay safe!