@biyao73 , I hate to say this but --- generally it is best to keep things simple where the IRS is concerned. Don't really understand why you are trying your hardest to file a resident --- the only advantage being ability to use standard deduction and whole bunch of credits ( if you are eligible ). What are you trying to achieve ? What are you not telling us ?
First for wages income you CANNOT use Schedule C without exposing yourself to Self-employment tax ( which you are excluded from because you are student ).
Second form 8833 is generally for assertion of treaty benefit positions where IRS rules conflict with treaty assertions -- don't see how this applies to you.
Third, if I assume that you are a student , unmarried and all you want to do is to exercise the exclusion of the first US$5000 of yearly earnings from US taxes , what is your tax advantage by being a tax resident -- do you other incomes ( non student type ) or what? Why do you need the standard deduction of $12,550 + ?
Please help me understand your situation --yes ?
