Merge tabs based on a named range

[StillUnderstanding]

Hello All,

I am finding it difficult to work out how to merge data from tabs in a workbook into a single sheet using a named range. The closest I can get is the code below but it presents me with a popup each time and asks me to manually enter the headers.

Can anyone help please?

Sub Merge_Sheets()

Dim startRow, startCol, lastRow, lastCol As Long
Dim headers As Range

'Set Master sheet for consolidation
Set mtr = Worksheets("Master")

Set wb = ThisWorkbook
'Get Headers
Set headers = Application.InputBox("Select the Headers", Type:=8)

'Copy Headers into master
headers.Copy mtr.Range("A1")
startRow = headers.Row + 1
startCol = headers.Column

Debug.Print startRow, startCol
'loop through all sheets
For Each ws In wb.Worksheets
     'except the master sheet from looping
     If ws.Name <> "Master" Then
        ws.Activate
        lastRow = Cells(Rows.Count, startCol).End(xlUp).Row
        lastCol = Cells(startRow, Columns.Count).End(xlToLeft).Column
        'get data from each worksheet and copy it into Master sheet
        Range(Cells(startRow, startCol), Cells(lastRow, lastCol)).Copy _
        mtr.Range("A" & mtr.Cells(Rows.Count, 1).End(xlUp).Row + 1)
           End If
Next ws

Worksheets("Master").Activate

End Sub