I am in F1 OPT from india working in California.. My salary before taxes is 8100$/month. My federal withholding is $797/biweekly pay check and $287 for state tax per paycheck. How much refund will I get if my annual base salary is $105000. What is the fefund amount I will get from CA state and federal. I also want to know whether I am eligible for f1 student tax exempt deduction and India-US tax treaty. Also can I claim my interest for CAr which I bought for $20,000. Please reply

Thanks in advance