Tab Map and Offset Function

Funding.xls
Please help me find my error with the below code for the attached Workbook.

Worksheet Password : pass
Sheet 1 is EC Template with Form to be filled out by User
Sheet 2 is the desired Tab Order/Map

Sheet is protected to prevent overwriting form titles and establish a easier entry path...

Sub Worksheet_Change(ByVal Target As Range)
'******************************************************************************************
'Function to get a variable Dollar value from User when the Contract Line Item (CLIN) number
'in Range ("A17:A28") equals 0217.
'
'Amount will be transferred to CLIN table cell for CLIN 0217 ("AC9")
'
'*******************************************************************************************
Dim Msg As String 'Message line to get User input
Dim FxdCost As Double 'Variable to hold Fixed Cost input from User
Dim VRange As Range 'Name Range for CLIN Column that will be incremented through looking for specific value
Dim cell As Range

'Initialize variable
Set VRange = Range("a17:a28")

If Intersect(VRange, Target) Is Nothing Then
Exit Sub
For Each cell In Intersect(VRange, Target)

'Test for CLIN 0217
If cell.Value = "0217" Then

'Prompt User for request amount to fund

FxdCost = InputBox("Enter the Amount of Fixed Cost you wish to fund ")
'Establish Quantity of Fixed Cost to default value of 1

'!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
'This is where the problem lays. If the User presses the Enter key the active cell is below and if
'the User presses the Tab key the active cell is to the right. I can establish a notice to use the Tab key, however
'I don't want the User to be taken to the Lookup Tables in the shaded section to the right.
'
'The Lookup Tables have to remain unprotected to allow changes/additions/deletions.
'
'Because I 'm not sure on what line within the Range("A17:A28")the User will enter the CLIN 0217 I would need
'to use the Offset function.
'
'!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
'
'Once I get the Offset to be correct, I want the Quantity to be a default value of 1 for CLIN 0217 and have
'the font color match the interior. That doesn't seem to be working.
'ActiveCell.Value = "1"
'ActiveCell.Font.Color = ActiveCell.Interior.ColorIndex
'ActiveCell.Offset(0, 3).Font.ThemeColor = xlThemeColorDark1

'Populate CLIN Table

Range("ac9").Value = FxdCost
End If

Next cell

End Sub

-----------------------------------------------------------------------------------------------------------------

Private Sub Worksheet_SelectionChange(ByVal Target As Excel.Range)
'***************************************************************************************
'Tab Cell Map designed to flow through the EC Template sheet without tabbing into the
'Lookup tables.
'***************************************************************************************
'Declare Variables
Dim TabCellMap As Range, cell As Range, Fn As Object, x As Integer


Application.EnableEvents = False

'Initialize
Set Fn = Application.WorksheetFunction
Set TabCellMap = Sheet2.Cells.SpecialCells(xlConstants, xlNumbers)

x = 1

'Error Correction call
On Error GoTo errhand
If Target.Row < LastAddr.Row Or Target.Column < LastAddr.Column Then x = -1 Else x = 1

'Start the Map
n = n + x
If n = Fn.Max(TabCellMap) + 1 Then n = 1
If n < 1 Then n = Fn.Max(TabCellMap)
'Continue loop
For Each cell In TabCellMap
If cell.Value = n Then
TabAddr = cell.Address
Exit For
End If
Next cell

Sheet1.Range(TabAddr).Select
Application.EnableEvents = True

Exit Sub
errhand:
Set LastAddr = Target
Resume
End Sub
Sub enable_events()
Application.EnableEvents = True
End Sub

Any and all help is deeply appreciated.

Thanks!
Ambassador777