"File" is on the Worksheet Menu Bar, not the taskbar.
Taskbar is a Windows function........the bar at bottom with "Start" at left
side.
Couple of ways to recover from this.
1. Tools>Customize>Commands
Select "Built in menus"
Drag "File" up to the appropriate spot on the worksheet menu bar.
2. Tools>Customize>Toolbars.
Select Worksheet Menu Bar and "Reset"
Note: 2. will reset any customizations you may have done to the worksheet menu
bar.
Gord Dibben MS Excel MVP