Hello,

I have a couple of questions and would really appreciate if you can advise and help me with filing of my taxes.

I am an international student with F1 visa and I have been working on my CPT from 13th June, 2011 and my contract got extended till 22nd December, 2011.
Regardless of my earning at my internship the big question is that I won $1000 * 5 that is total $5000 in lottery during last few months.
As a student they deducted $50 each from each of the $1000 checks. So will this $5000 income from lottery affect the tax benefits / refund that I am expected to get for the internship paychecks?
If not, is there a way I can show / claim with some proof, any expenditures, in which I had to spend all that lottery money I won?
I am worried that I won't get any refund for filing my taxes.
Please help / advise me what to do.
Thank you.

I'm assuming you are a non-resident alien.
You would enter those winnings on Schedule NEC of form 1040NR. Winnings from lottery/gambling are taxed at a flat rate of 30% unless there is a tax treaty with your country that says otherwise (Canada for example).
You cannot deduct any gambling losses related to these winnings (unless you are from Canada).
Obviously, the withholding was not enough (as it was only 5%) and you will owe additional taxes.

The situation would be different if you ara a resident alien. How long have you been in the US and from where?

Thank you. I am from India and have been on F1 status from August 2010. Kindly let me know if you need more details like how much I have earned in my internship but I would love to know how much will I have to pay and / or how much will I get back from tax filing. Thanks again for your concern!

Based on the information you provided, you are a non-resident alien.
So you will have to file form 1040NR. You can download it here and get an estimate for your taxes. Note that the 2011 forms are not available yet.

http://www.irs.gov/pub/irs-pdf/f1040nr.pdf