Tds on online payments - query to experts

Dear All,

I've a tricky query regarding how Tax to be deducted on online payments.

Backgroud:

Our co. is into SEO/SEM digital media for our clients. To carry out these services, we need to hire services of google or related Search Engine providers. The biggest problem is that the payment have to made by online by Cr card. So, now the query is how to deduct tax (may be as contractor) while making these payment as it does not allow to put the net figures. OR can we approach Google or other SE provider to their local office in india etc...

If any one has solution, Please reply to this query..

thanks,

Sandeep