GTA amount paid. mention in ST Return

Hi friends

I am new to service tax Return filing, i just got our account transfered to ACES, now when i am trying to fill up the return,I have following issues to be solved

1) i am not able to find any column where i should mention about the payment of ST towards GTA(Goods Transportation Agency) service recieved.

  2) how to file a nil return, as our company has not done any taxable service to any of our client(nil payable but we are claiming input tax on telephone expenses).

3) We are excise assessees and we have some credit in our account for the same, should we show the whole amount of credit available with central excise too? or can we ignore the whole section as our return is nil(nothing payable)

Help me to file the return?

Thanks in advance