A person having Registration of service tax provided taxable services in the year 2005-06 and paid service tax amount for which he was liable and filed the return...........but after 2005-06 he did'nt provide any taxable service and also for the same he is not liable to pay service tax till 2010-11, but now in the year 2011-12 he has to pay service tax because again he started to provide taxable service.............now what he should do to file return of service tax as he did not furnish return till 2010-11.... weather any penalty bwill be levied on him for non furnishing return of service tax? if yes then pls tell the consequences.