Adding text box that accepts input for printing SSRS 2008 r2

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SSRS-2008

Hi,

my question is not about to accept input parameters. i have made a ssrs report 2008 r2 and displaying some data using stored procedure(returning name, address, remark). it is running fine but i want remark value should be empty and editable under the remark column for the user. then he/she can enter any value and export or print it.
how can i do it?
could you please give an idea.
e.g:
Name ---- address ---- remark
abc ------- xyzabc ---- (this should be editable and blank)

thanks
Gaurav