Sub Goal_Seek_Column()
Application.ScreenUpdating = False
Dim i As Long, lastrow As Long
With ActiveSheet
lastrow = Cells(Rows.Count, "T").End(xlUp).Row
For i = 2 To lastrow
Range("T" & i).GoalSeek Goal:=0.4, ChangingCell:=Range("S" & i)
Next i
End With
Application.ScreenUpdating = True
End Sub