@ikseek , if you file as a Non-Resident, then you include ONLY your US sourced income for US taxes and on form 1040-NR ( not supported by TurboTax and usually not by the groups I mentioned earlier ).
If you file as a resident ( exercising the first year choice as mentioned earlier ), using form 1040 ( fully supported by TurboTax ) hen your world income from the day you were admitted to the USA becomes taxable to USA. To reduce the effects of the double taxation, you can use foreign tax credit / deduction ( form 1666 ).
As always , if you need help , just add to this thread and one of us would be happy to help.
