Tax treatment for foreign exchange income

Hi

I am a consultant who has earned income in USD for fixed monthly consultancy fee to a foreign company. For part of the year, I was employed by a company. The country has DTAA with India and they have deducted 10% tax before payment to me.

Now, for filing income tax in India can I use SUGAM form? How would i prove that income tax has already been deducted from payments made to me?

finally, after getting 10% deducted by the foreign company do i still have to pay 33% income tax (i recollect vaguely difference between service tax and personal income tax)?

Thanks

Abhishek