St 3 filing

Service Tax Input

Dear All, 

I would like to know where the Service Tax Input can be showned in the ST 3 Return.

Normally What we raise the invoice we are getting the Service Tax amount and wil be paid to ST dept.

We are paying Service tax to the bills (is that Service Tax Input), like Rent paid along with Service Tax can be claimed as Service Tax input right?  Where will we need to show in the ST 3 form?  Kindly help me. Sorry my english is bad.