'm repr�sente le mois limite et a repr�sente l'ann�e
Function taxe(cel2, cel, m, a)
'MsgBox CDate("1/" & m & "/" & a)
If cel = "" Then Exit Function
d = DateDiff("m", CDate("1/" & m & "/" & a), cel)
If d > 0 Then
taxe = d
taxe = (cel2 * 10) / 100 + (cel2 * 5) / 100 + cel2 + ((cel2 * 0.5 / 100 * taxe))
Else
taxe = cel2
End If
End Function