Deducting both tds and service tax

Aditya Vikram ( ) (81 Points)

25 November 2013  

Hello guys,

I dont know how to explain this, but I have hit a technical speed-bump. I'm a little confused on something. 

Now I have a service, say Office Security Guards.. service tax is being charged, AS WELL AS TDS @ 2%. And I have another service Air Travel Agent who provides us with Air tickets for travel, and there only ST is charged...

 

When do these instances occur where TDS is deducted along with service tax? I'm a little confused on TDS concept here. 

 

Another instance where TDS was deducted along with ST was COURIER charges. 

 

Please help solve this confusion. 

I have a partial theory, when service is provided, ST is charged...when _______ is provided, TDS is done... what is this _____? I cant put anything in these blanks to help understand it.