My organization is working in Orissa on disaster management. We availed services from one agency (local based) and their total bill throughout the financial year crossed Rs. 14 lakhs . Agency is not claiming the service tax. Please let me know , if agency does not claim service tax if their total bill amount exceeds Rs. 10 lakhs in a financial year then whether reverse liability will come on us ? Since we are registered NGO of orissa and we do not want to violate any rules. Whether paying service tax liability will come on us at any point of time ?