Correction of income tax return for aop

Sir,

an AOP firm( 2 members) (dealing in foreign liquor business) filed a I.Tax return for the asstt.Yr 2013-14(Audited file) on dated 18/10/2013, where income has shown  Rs 415400/- and tax was calculated  Rs 22186/- in ITR 5. but intimation u/s 143(1) when received from CPC, there tax has calculated of Rs 128357/- and intimation was sent for rectification and again same return has sent on dated 14/12/2014.

I want to know from Ld Profession why the department calculated tax @ 30% ?

 and in what ITR the return should fill up ? and what  percentage of tax should charged ?