Mvat and cst return not filed of last quarter

sachin (Accountant) (54 Points)

13 February 2015  
Hi all, me working in a private ltd co. and me as a accountant not file last qtr i.e Oct 14 To Dec 14 MVAT and CST return.Now my question is that can i file a return and what is the penalty for not filing a return for both MVAT and CST. Pls give me direction.