Llp tax penalty

Hi,

I have an LLP which is dormant for quite sometime now. I opened it in 2011 and did not do any work for / in it since then. I didnt realize that filing of tax is mandatory for this LLP every year and hence I did not file any tax tll now for that (2015). I recently recieved a notice that I have to submit a penalty of INR 4-5 lacs with my LLP's ITR. Is there any way out? Can this fine be excempted or reduced by any means now? What can I do to get exempted from this? Please suggest.

Thanks