Help with some code please

Help with some code please

In a multi line text box I use some script to populate the box

The script is

input.Map_Address = input.Clients_Name + ", " + input.Clients_Address + ", " + input.Post_Code + ", " + input.Telephone + ", " + input.Place;

This produces

Ian Mitchel, Benfleet Close, SM1 3SD, 07860635993, Sutton

I want it to be

                 Ian Mitchel
               Benfield Close
                  SM1 3SD
               07940635993
                   Sutton

How do I add the carnage return and how do I centralise

Thanks