İYİ GÜNLER ÜSTADLARIM. AŞAĞIDAKİ KODU ÇALIŞTIRAMADIM...

Private Sub Worksheet_Change(ByVal Target As Range)
    Dim bul As Range
    Dim trh As Date
    Dim CsutunTarih As Date 
 
  With ThisWorkbook.Sheets("T1")
If (Target.Column = 3 Or Target.Column = 5) And Target.Row >= 1 Then
        If IsDate(Cells(Target.Row, "c")) And Len(Cells(Target.Row, "E") & "") > 0 Then
            SonStn = .Cells(1, .Columns.Count).End(xlToLeft).Column
                    Set bul = .Range("B1:" & .Cells(1, SonStn).Address).Find(Year(Cells(Target.Row, "C").Value), , , 1)
                    Set kaydir = .Range("A:A").Find(Cells(Target.Row, "E").Value, , , 1)
                    If (Not bul Is Nothing) And (Not kaydir Is Nothing) Then Cells(Target.Row, "F").Value = .Cells(kaydir.Row, bul.Column).Value
        End If
      End If
    End With
    Set bul = Nothing

If Target

On Error Resume Next
    Dim X As Long, No As Long
    If Intersect(Target, Range("B2:B65536")) Is Nothing Then ' B2 koşulun Hangi Hücrede başlasın'
    Target.Offset(0, -1).Font.Color = vbRed ' Rekli Sayı Verir'
    Application.ScreenUpdating = False
   
    For X = 2 To Selection.SpecialCells(xlCellTypeLastCell).Row  'x=2 koşulun Hangi Hücrede başlasın'
        If Cells(X, "A").MergeArea.Count = 1 Then
            If Cells(X, "B") <> "" And Cells(X, "A") <> "Sıra No" Then
                No = No + 1
                Cells(X, "A") = No
            Else
                If Cells(X, "A") <> "Sıra No" Then
                    Cells(X, "A").ClearContents
                End If
            End If
        End If
    Next
    Application.ScreenUpdating = True
End Sub