Dear Friend,
Please find the below mentioned link as enter your tan no. in tan based view
https://tin.tin.nsdl.com/oltas/index.html
and mentioned the period from & Upto (i.e first date on which challan is paid in this qtr and last date
of challan of the qtr. eg. 07.11.2012 to 07.01.2013.
you can easily download the csi file from the internet.
save it and while creating the fuv please confirm/check the same with csi.
if it is error free then ok otherwise first remove the errors.
Hope the above will serve your purpose.
Rgds,
Manoj