Mvat return

Dear Sir,

While Revising Returns During VAT Audit of 12-13 of a particular client , there was mistake made while filing the return. the mistake was instead of revising MVAT return of a particular Quarter of Year 2012-2013 , the period was was wrongly entered of 2013-2014. so MVAT return i.e form 231 of a particular quarter of 2013-2014 was revised u/s 20(4)(a) . so my question is what remedy is available for such mistake ? whether such return can be further revised?

Please Help me in this regard,

Regards ,

Amit.