If an organization had aggregate revenues or expenses of more than $10,000 from attributable to grantmaking, fundraising, business, investment, and program services outside the United States, or held investments outside the United States in foreign partnerships, foreign corporations, and other foreign entities with an aggregate book value of $100,000 or more at any time during the tax year, then the organization is required to attach Schedule F along with the Form 990.
Also, if the organization reported more than $5,000 in the aggregate, of grants and other assistance to foreign individuals and to domestic organizations or domestic individuals then it must attach Schedule F.
While filing Form 990 in ExpressTaxExempt using the "Interview-Based" filing, schedule F will be automatically generated. In case if you opt to file your Form 990 using the "Form-Based" filing, then Schedule F will be made available to you depending upon the information you enter in your Form 990.