Schedule A is generally used to report information about public charity status and public support. Organizations that need to report their public charity status and the public support are required to file and attach Schedule A along with its Form 990, Return of Organization Exempt from Income tax.
Here is the list of other organizations that must file Schedule A:
While filing Form 990 in ExpressTaxExempt using the "Interview-Based" filing, schedule A will be automatically generated. In case if you opt to file your Form 990 using the "Form-Based" filing, then Schedule A will be made available to you depending upon the information you enter in your Form 990.