To Format a column to 2 d.p

:=======================
Sub RoundColumn()
Columns("A:A").NumberFormat = "#,##0.00"
End Sub
:=======================

To round each value in a selection to 2 d p

:=======================
Sub RoundColumnValue()

Dim cl As Range

For Each cl In Selection
cl.Value = Application.WorksheetFunction.Round(cl.Value, 2)
Next cl

End Sub

:=====================

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