@boba5555 , since there is no tax treaty between Serbia and the USA, your scholarship / stipend would be viewed as income -- same as for US persons. So treating you as resident alien for tax purposes, you report the scholarship as income and pay taxes on it. Under educational expenses, you should be able to show the income as scholarship and any expenses paid to the school may be deductible. If there are no educational expenses then you just show the income as "other" income and on the comments line say this is fellowship from Switzerland.
If you need more help on this, feel welcome to add more questions here and I will come back and answer
