In a previos post:Excel vba: Save invoice data we added/copied data between sheets. This post describes how to overwrite existing values with new values.

If invoice number already exists, a message box asks if you want to overwrite old values with new values.

VBA code:

Sub Button2_Press with left mouse button on()
  Dim rng As Range
  Dim i As Long
  Dim a As Long
  Dim rng_dest As Range
  Application.ScreenUpdating = False
  'Check if invoice # is found on sheet "Invoice data"
  i = 1
  Do Until Sheets("Invoice data").Range("A" & i).Value = ""
    If Sheets("Invoice data").Range("A" & i).Value = Sheets("Invoice").Range("D13").Value Then
      'Ask overwrite invoice #?
      If MsgBox("Overwrite invoice data?", vbYesNo) = vbNo Then
        Exit Sub
      Else
        Exit Do
      End If
    End If
    i = i + 1
  Loop
  i = 1
  Set rng_dest = Sheets("Invoice data").Range("D:G")
  'Delete rows if invoice # is found
  Do Until Sheets("Invoice data").Range("A" & i).Value = ""
    If Sheets("Invoice data").Range("A" & i).Value = Sheets("Invoice").Range("D13").Value Then
      Sheets("Invoice data").Range("A" & i).EntireRow.Delete
      i = 1
    End If
    i = i + 1
  Loop
  ' Find first empty row in columns D:G on sheet Invoice data
  Do Until WorksheetFunction.CountA(rng_dest.Rows(i)) = 0
    i = i + 1
  Loop
  'Copy range B16:I38 on sheet Invoice
  Set rng = Sheets("Invoice").Range("B16:E38")
  ' Copy rows containing values to sheet Invoice data
 For a = 1 To rng.Rows.Count
    If WorksheetFunction.CountA(rng.Rows(a)) <> 0 Then
      rng_dest.Rows(i).Value = rng.Rows(a).Value
      'Copy Invoice number
      Sheets("Invoice data").Range("A" & i).Value = Sheets("Invoice").Range("D13").Value
      'Copy Date
      Sheets("Invoice data").Range("B" & i).Value = Sheets("Invoice").Range("F3").Value
      'Copy Company name
      Sheets("Invoice data").Range("C" & i).Value = Sheets("Invoice").Range("B8").Value
      i = i + 1
    End If
  Next a
  Application.ScreenUpdating = True
End Sub

How to add the macro to your workbook

1. Press Alt-F11 to open visual basic editor
2. Press with left mouse button on Module on the Insert menu
3. Copy and paste above vba code
4. Exit visual basic editor

The macro displayed in the picture above is not used in this article.

Get the Excel file

Edit-invoice-data.xls