Set off from renting

Ankit (XX) (77 Points)

08 May 2012  

 

my sister in law has a SOP which she wants to rent it to my brother's proprietorship firm. Also, my brother has a commercial gala which he wants to give on rent to that firm itself. They are providing architects services and are registered for the same service in the service tax dept. 
 
What will the service tax implications for the FY 11-12? Will they both have to get registered with ST dept for the service?
 
 
Further, till now my sister in law was an employee there in FY 12-13 she will become partner in the firm and the premises will be on rent with the firm. What shud i suggest them for taking set-off the service tax they get?