no module named DailyExpenses, pretty much means what it says. Something is definately wrong with one of the script names/locations. You have DailyExpenses.py or .pyc in the same folder as DailyExpensessave.py ? Not in a subfolder or anything?
For Each ctrl As Control In Me.Controls("pnlMainPanel").Controls
If ctrl.GetType Is GetType(System.Windows.Forms.Panel) Then
For Each subCtrl As Control In ctrl.Controls
If subCtrl.GetType Is GetType(System.Windows.Forms.TextBox) Then
If subCtrl.GetType Is ...