If you have received 1040 S instead of W-2 , you must file 1040 NR otherwise you will be getting audited and has to amend your previous tax filing.

Who ever files 1040 NR EZ will not be allowed to deduct standard deduction which leads to higher tax rate and less refund.  On line 11 you are allowed for itemized deductions. All mandatory school expenses not insurance and tuition, lab fees, books and exercise copies and related to your school are allowable deductions. Advised to keep them for proof in case you’re audited. In past I had met couple people who had filed 1040 NR; they always itemized and were able to get little money back.