Is your organization required to file an IRS Form 990 return? Except for churches, other religious institutions, and their closely related organizations, all tax-exempt organizations must file one of three versions of the Form 990 information return. No such organization is too small for the IRS! Failure to file Form 990s for three consecutive years will result in automatic revocation of tax-exempt status. So make sure you have the necessary information to fulfill this important filing requirement.