How to find fd interest for the assessment year

I approximately calculated my FD interest for the assessment year 

F.D amount 900000   rate of interst 9%  hence 81000 No TDS is deducted since i file 15G

however my auditor told me it is 86043 He said he can get the amount from some site.

can you give me the site address 

The FD starts on 17th April 3 year FD 2nd year interst around 86000+

Did he calculate or is it available from Govt site /

Thank you