Service Tax Income crossed 10 Lakh but Does not cross this year. Should I need to raise Service Tax Bill?

Previous year Service Tax Income Cross 10 Lakh. Accordingly we enrolled service tax registration, submit service tax challan & filled the return. But this year we are not crossing 10 Lakhs thresh-hold limit. My question is do I need to raise Service Tax bill to the party for collecting Service Tax & then submit the Service Tax return instead of NIL Return?