I'm an international student on F1 visa on a scholarship from my country. I have run the test and I turned out to be Resident Alien, however, I have never received any income during my entire stay in the US. is form 8843 the right one for my case? OR I have to use other forms like 1040?
I am assuming here that you are receiving stipend / grant from Saudi Arabia for education and living expenses. As a US Resident for tax purposes, grants/scholarships are not taxable to the extent they are used only for education purposes ( school fees, required tool/equipment/ books etc.) i.e. the portion used for non-qualified use., such as living expenses are taxable income. So you may be liable for this and therefore you would have to file form 1040 and would need to include the details from form 1098-T from your school.
You can also include a 1098-T and try and convince the IRS that since you are still a student from another country and have no intention of staying here , that your closer connection is to Saudi Arabia. and that you are complying with the conditions of your visa-- thus they should treat you to be a Non-Resident. If this works then they will allow you to file a form 1040-NR and therefore you can exclude the income from Saudi Arabia
Insha Alla, it will work