If your input cells are in a left to right, top to bottom sequence,
unlocking input cells, protecting sheet and Tabbing to them will work.
If not in that sequence you can create a named range in the order you want.
Start with last cell in order then CTRL + Click your way through the
sequence.
See Bob Phillips' site for more on this.
http://www.xldynamic.com/source/xld.xlFAQ0008.html
You can also use VBA to tab through a sequence of cells.
Private Sub Worksheet_Change(ByVal Target As Range)
'Anne Troy's taborder event code
Dim aTabOrd As Variant
Dim i As Long
'Set the tab order of input cells
aTabOrd = Array("A5", "B10", "C5", "A10", "B1", "C3") 'adjust to suit
'Loop through the array of cell address
For i = LBound(aTabOrd) To UBound(aTabOrd)
'If the cell that's changed is in the array
If aTabOrd(i) = Target.Address(0, 0) Then
'If the cell that's changed is the last in the array
If i = UBound(aTabOrd) Then
'Select first cell in the array
Me.Range(aTabOrd(LBound(aTabOrd))).Select
Else
'Select next cell in the array
Me.Range(aTabOrd(i + 1)).Select
End If
End If
Next i
End Sub
Gord Dibben MS Excel MVP