TDS

friends,

since 30/9/2010 we have deducted tds while paying rent to our building owner, but since then we have not deposited thet deducted amount in to government a/c. we didnt file even  quarterly returns also> if we deposite that entire amount thent what is the interest rate for late deposite , is it 12% or 18%? and what is the interst charging period  is it from date  of deductuble  to date of deposite ? or  from date of due date to deposite ( 7 th of next following month) to date of deposite ? pls answere me friends ! thanks in advance!