When you download a trial balance file, you get all of the data that was in the file when it was added to the Import Queue and that was present prior to the import of the file, which trims off all data except the required trial balance datat. If you only want the trial balance data, then you need to export the file.
You can download a trial balance file to a .csv Excel file in either of two ways as follows:
Downloading from the List View
To download a trial balance file from the Review Trial Balances List View,
Downloading from the Detail View of the File Itself
To download a trial balance file whose details you are currently viewing,