Doubt on service tax liability

sumit (proprietor) (58 Points)

27 July 2015  
Please clarify about the following situation:- My Company raised an invoice for receiving advance payment of Rs 30 lakh in July month but advance payment is still not received. So, Is Service tax liability will arise in this case and do we need to deposit service tax on 5th of August 2015 (after due consideration of input credit).