i want to create order of invoice as well as want to calculate 14.5 tax in my invoice indian rupees.. using asp.net

i want to create order of invoice as well as want to calculate 14.5 tax in my invoice indian rupees.. using c# asp.net
and also want to know.. what i have to use either gridview or textboxes where want to add soltion no. , item, description, qty,rate,tax .amount, and total amount..  in my  c# asp.net web form 

i m not getting what have to used gridview or textboxes.. but its look like bill format like repciep.. thak u